Peaches Geldof's youngest sister Tiger Lily has been an "incredible rock" for her family.
The 25-year-old presenter was discovered dead at home last month with youngest son Phaedra, 12 months, by her side and insiders say 17-year-old Tiger - who was found in the room with her mother Paula Yates when she passed away 14 years ago - has been a huge source of support for their loved ones, including Peaches' husband Thomas Cohen.
A source close to the teenager - whose father is the late Michael Hutchence - and her family told Grazia magazine: "Thom's family are being amazing but surprisingly it is Tiger who has proved to be the greatest support for both families.
"She is the girl left in the same scene her nephew was found in and yet she has become this incredible rock for everyone when she's just a teenager. It's amazing."
Peaches' husband - with whom she also had two-year-old son Astala - and her sister Pixie, 23, are said to be finding it particularly hard to come to terms with her death, which is believed to have been caused by heroin use.
The source added: "Pixie has been in a state of uncontrollable grief - Peaches was so close to her. They shared a room, they shared a tragedy and they shared a wild youth and coming of age.
Thom is just catatonic with grief. His world has stopped."

Leonardo DiCaprio wants to buy surfer paintings for his new home.
The 'Wolf of Wall Street' actor - who recently splashed out $10 million on an eco-friendly New York apartment - has taken a keen interest in punk icon-turned-artist Raymond Pettibon's exhibition at the Venus Over Manhattan gallery and is so keen on the artwork, he and girlfriend Toni Garn have visited the showcase every day for the last 10 days.
A source told the New York Post newspaper: "He's been there in the middle of the day, strolling around looking at the art. He'll point something out and Toni's just like, 'Uh-huh, that's nice.' "
It was revealed earlier this week Leonardo has splashed out on a luxury two-bedroom fourth-floor property at the Delos building in New York's Greenwich Village, and the complex - which has WELL certification for its holistic approach to improving human wellness - boasts facilities including vitamin C-infused showers, purified air and water, and a circulated aromatherapy air supply.
The property also boasts posture-supportive heat reflexology flooring and 'dawn simulation' provided by a circadian lighting design. In addition, Donna Karan's Urban Zen is providing the building's residents with a 'wellness concierge' to "curate and coordinate your daily wellness experience," the New York Post newspaper reports.
Until a luxury duplex apartment in the same building is sold, Leonardo has also been told he can use a $1 million parking space which comes with the neighbouring property.

Lily Allen "can't stop" projectile vomiting.
The 'Hard Out Here' hitmaker - who has just released her comeback album 'Sheezus' - appears to have caught food poisoning as she has a high temperature and has been sick several times.
She tweeted: "I can't stop projectile vomiting,also temperature #poisoned (sic)".
Lily first tried to keep her symptoms at bay with a healthy 'green' juice as she prepared to film an appearance on UK TV show 'Alan Carr: Chatty Man', but then resorted to drinking lots of water to flush the bug out of her system.
Alongside a picture of herself sipping a healthy-looking drink as she got her fingernails painted and her make-up applied, she tweeted: "Prepping for chattyman feeling a little bit #QUEAZUS and very #SNEEZUS green juice emergency. (sic)"
And adding another picture of several bottles of water, she added: "#SHEEHYDRATING #poisoned (sic)"
As well as feeling ill, the 29-year-old singer - who has daughters Ethel, two, and Marnie, 16 months, with husband Sam Cooper - is upset after she lost her camera at the Met Gala in New York on Monday (05.05.14).
She tweeted: "Just unpacking and realised I lost my samsung galaxy camera 2 at the #Metball2014 if anyone finds it Holla. I'll buy you haribo for life (sic)"

Blake Lively shunned Met Gala afterparties to go for ice cream.
The former 'Gossip Girl' actress and her husband Ryan Reynolds tucked into $9 sweet treats at New York coffee shop Serendipity after the glitzy Costume Institute Gala at the Metropolitan Museum of Art on Monday (05.05.14).
She said: "I went to Serendipity... had frozen hot chocolate with extra peanut butter sauce on the side. Closed that place down! That's how I do an after party!"
'The Age of Adeline' actress admits she has a sweet tooth and hates the gym, but keeps trip by balancing her indulgences with cooking healthy "fresh" foods and finding different ways to exercise.
Speaking to 'Extra', she said: "I like to cook... I use a lot of fresh ingredients, which really does make a huge difference. It's easier to be healthy when eating things that are fresh, because they are often fruits and vegetables, but I also live a very active lifestyle.
"I've said before I hate the gym, I eat chocolate, yes that part is true. But what they don't print is I hate the gym, so what I do instead is find other ways to be active... I ride bicycles, I hike, I go out and exercise in nature and I'm active that way."

Tom Cruise will hit the red carpet in London, Paris and New York for the 'Edge of Tomorrow' premiere on the same day. The Hollywood hunk will join his co-stars on May 28 as they race against the clock to touch town in all the three countries within 24...

Simon Cowell's Syco Entertainment and Animal Logic Entertainment are collaborating to develop music-based animation films.
The music mogul, 54, is thrilled to have the chance to work closely with the special effects house and is excited with what they're going to produce, with the first film tipped for a 2016 release.
He said in a statement: "It is a dream come true to have this opportunity of working with Animal Logic. I think their work is pure genius and I really feel excited about the films we are going to be making together."
Animal Logic's Zareh Nalbandian is also delighted about the prospect of creating family friends films.
He added: "We are thrilled to bring together the amazing talent, global reach and expertise in popular music of Syco Entertainment alongside Animal Logic's rich history of innovative, cutting edge animation and universal storytelling. I am confident our truly complementary collaboration with Syco will be a very powerful force in family entertainment."
Syco previously teamed up with Sony Pictures to produce documentary 'One Direction: This Is Us' based on the boy band who were discovered on Cowell's UK 'X Factor' contest in 2010.

The Horrors think Beyoncé is more interesting than most rock bands.
The band - made up of Faris Badwan, Rhys Webb, Tom Cowan, Joshua Hayward and Joe Spurgeo - claim the 'Drunk in Love' hitmaker had more of an influence on their new album 'Luminous' than fellow artists.
Bassist Rhys Webb told the Daily Star newspaper: "Beyoncé doesn't sound the most obvious influence on our music but her songs are like modern-day Motown classics and we identify more with that than we do with our contemporaries."
Rhys also hit out at artists like Lily Allen, whose album 'Sheezus' is available on Google Play for just 99p, because he feels modern music is throwaway.
He said: "Her record company have done that to give Lily a surefire number one - albums should be something that are there for a lifetime."
The five-piece have a bumper schedule for festival season with spots at Isle of Wight,­
Reading and Leeds and Field Day this summer.
Rhys said: "We've crept up the bills and we're ready to headline the ­bigger fest­ivals."
Meanwhile, Adele's producer Paul Epworth has helped on their track 'Falling Star', the first time the act has had help for five years.
But Rhys explained: "The next stage of our evolution may involve getting someone else in to produce a whole album for us."

Chuck Berry and Peter Sellars will receive the 2014 Polar Music Prize.
Rock 'n' roll legend Berry, 87, and American opera and theatre director Sellars, 56, will both be presented with the prestigious accolade by King Carl XVI of Sweden at a gala ceremony in Stockholm, Sweden on August 26.
The Polar Music Prize was founded in 1989 by ABBA's lyricist and manager Stig "Stikkan" Anderson to "break down musical boundaries by bringing together people from all the different worlds of music", and this year's ceremony - which will take place in Stockholm's Concert Hall - will mark the award's 25th anniversary.
This year's laureates epitomise Anderson's aim for the award - which he named after his own record label - as Berry is universally acknowledged as one of the pioneers of rock 'n' roll music due to a number of classic songs including 'Maybellene' and 'Roll Over Beethoven'.
Meanwhile, Sellars is an acclaimed American opera, theatre and festival director seen as a visionary artist because of his innovative re-interpretations of classic works.
Past winners of the Polar Music Prize include Sir Paul McCartney, who was the first artist to ever receive the accolade, Sir Elton John, Bob Dylan, Patti Smith, Pink Floyd, Bruce Springsteen, Ray Charles and Led Zeppelin.

Britain's Prince Harry hosted a gala to mark the tenth anniversary of his Sentebale charity on Wednesday night (07.05.14).
The 29-year-old royal welcomed guests including the charity's co-founder, Prince Seeiso of Lesotho, to his Sentebale Summer Party at The Dorchester hotel in London, where they were treated to a VIP drinks reception and gourmet dinner.
The evening culminated in the presentation of awards to key people and organisations who have supported the charity's tireless work helping orphans in the Aids-stricken nation of Lesotho over the last decade.
According to the Daily Telegraph newspaper, Harry told the crowd during a speech: "When I see or hear the difference that Sentebale and its partners have made in the last 10 years, it is a constant reminder that, not only are we doing great things in this little African country, but how much we rely on the help and expertise of everyone around us.
"What a difference we can make if we all work together."
Guests - who included Westlife's Kian Egan - were serenaded by the Basotho Choir's traditional songs, as well as performances by singers Joss Stone and Beverley Knight.
Prince Seeiso stressed the importance of helping children orphaned by the devastating HIV virus in his country.
He said: "Harry and I know what it is like to lose a parent, or parents in my case, and it is a combined desire to carry on our mothers' legacy of work that formed Sentebale."

Khloe and Kourtney Kardashian have already angered residents in the Hamptons as they prepare to spend the summer there.
The famous sisters are set to film their new reality TV show 'Kourtney & Khloe Take The Hamptons' for E! but neighbours are less than impressed by the thought of them spending the coming months in the area.
A source told the New York Post newspaper: "They have been looking at property on Little Plains Road in Southampton, and already the neighbors are up in arms about it.
"They don't want the hassle of the entourage, the cameras, the paparazzi and all the fanfare that comes with this attention-seeking family."
The siblings will open a Dash pop-up boutique in the luxurious coastal spot and will also work on relocating their SoHo-based store in New York City to a new area during the series, according to the network.
Kourtney's long-term boyfriend Scott Disick and their children, Mason, four, and Penelope, 19 months, will join them.
Southampton Village Mayor, Mark Epley, claims he has heard rumours about where Khloe and Kourtney will be living and he is concerned what residents will think of the show being filmed there.
He said: "The village is a fairly quiet [one], and I think there is some concern."
However, Mayor Epley said no filming permits have yet been filed and the family will have to "follow the guidelines".
According to the village website, filming on any village beaches is not permitted from Memorial Day at the end of May through to September 30.

Kanye West wants to have his bachelor party in Dublin.
The 36-year-old rapper is preparing to marry his fiancée Kim Kardashian in Paris later this month, and it's now been revealed that he's planning to spend his final night as a single man in the Irish capital with his best pal and fellow rapper Jay Z.
A source told The Sun newspaper: "Kanye loves Dublin, as does Jay Z, and it's pretty close to Paris so it's a perfect option before the wedding.
"He has had his people looking into places like The Four Seasons and the Ritz Carlton and clubs they could take over for a night."
Kanye is said to be keen to host a bachelor party in Ireland because he wants to be able to do what he wants for one more night before he embraces Kim and the rest of the Kardashian clan.
The source added: "Kim will be doing her own thing with the girls and Kanye knows that in Dublin he would pretty much be left to himself."
And it could be the second bachelor party the 'Bound 2' star celebrates as it was previously claimed Jay will throw him a lavish celebration at his New York club 40/40.
Meanwhile, The 'New Slaves' hitmaker was reported to have tied the knot with Kim last week, but the 33-year-old beauty quashed the rumour saying, "Still Kim, Mrs. West soon", at the Met Gala earlier this week.

Laura Whitmore has achieved her career dreams.
The 28-year-old presenter feels "very lucky" to have already landed some of her ideal jobs and can't wait to see what the future holds.
She said: " I'm very lucky and have already ticked off many of my dream presenting jobs! I've always wanted to present the Brit Awards so to be able to do that was fantastic.
"And as a child I grew up watching 'CD:UK' and 'SM:TV' with Ant and Dec so the fact that I get to be on the same screen as them for 'I'm a Celebrity Get Me Out Of Here! NOW!' is amazing. New shows are being made all the time so I'm excited to see what's next...watch this space!"
Though the Irish beauty adores her job, she admits some days she has to force herself to get in front of the camera.
She told BANG Showbiz: "The best part of my job is that I get to do what I love every day. It's a challenge and it's exciting but I can't imagine ever getting tired of it. The bad part is that some days you just don't feel like being on camera and you have to be."
And though she admits things don't always go to plan when she's presenting live TV, she insists that's part of the "fun".
She added: "I've had a few live TV disasters but half the fun of a job like mine is how you cope with those situations."
Style icon and TV presenter Laura Whitmore has partnered with Timex to discover what 'Wear It Well' means to the UK. As the Timex Style Insider, Laura has been scouring the streets to uncover the nation's unique expression of style and find out where we get our fashion inspiration from. Check out what she found at www.timex.co.uk/wearitwell or join in the conversation and tell us what Wear It Well means to you by tweeting @TimexUK with #Wearitwell.