It looks like Heidi Klum and Seal are in for a bitter divorce.

The couple were married for seven years before they announced their separation in January, with the supermodel officially filing for divorce in April, citing "irreconcilable differences."

The couple released a joint statement about their initial separation and it appeared as though things were amicable, but RadarOnline reports that there are a number of contentious issues and "the gloves are about to come off."

When the 39-year-old model filed for divorce, she listed that she was seeking primary physical custody of the couple's four children, Leni, 8; Henry, 6; Johan, 5; and Lou, 2 -- a request which Seal has since countered, demanding that they get equal time with the kids.

According to the website, the "Kissed by a Rose" singer has also contested Klum's claim that the couple have no joint assets that need to be divided between them. Given that Seal is worth a reported $15 million, while Klum is worth $70 million, it's poised to be a big battle with plenty to argue about.

Another point of contention is the fact that Seal used personal photos of their children in an ad campaign without Klum's permission. An insider explained that the model didn't want their private moments made public, and she acted quickly by hiring a lawyer who had the video removed.

"Heidi isn't trying to cause trouble. She's just trying to protect her brood," a friend explained to the website.

Klum also opened up to Allure magazine in April about this painful time:

"It's hard, just like for other couples. People go through our trash cans. It's crazy. And you know, we have four kids; they have to go to school," she explained, adding that you just have to deal when things don't work out as you planned.

"Because sometimes life throws you a curveball and then you just figure it out and deal with it, but my dream always was that. To have the perfect family and have lots of children and a beautiful garden and trampolines and swings and things."

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  • Heidi Klum & Seal

    Musician Seal and model Heidi Klum attend the '2004 CFDA Fashion Awards' at the New York Public Library June 7, 2004 in New York City.

  • Heidi Klum & Seal

    Singer Seal and model Heidi Klum arrive at the Bambi Awards 2004 at the Theater im Hafen on November 18, 2004 in Hamburg, Germany.

  • Heidi Klum & Seal

    Model Heidi Klum and fiance, musician Seal, arrive at the Vanity Fair Oscar Party at Mortons on February 27, 2005 in West Hollywood, California.

  • Heidi Klum & Seal

    Singer Seal and his pregnant wife model Heidi Klum attend the 2005 CFDA Awards at the New York Public Library June 6, 2005 in New York City.

  • Heidi Klum & Seal

    Singer Seal and actress Heidi Klum pose at the Governor's Ball after the 58th Annual Primetime Emmy Awards at the Shrine Auditorium on August 27, 2006 in Los Angeles, California.

  • Heidi Klum & Seal

    Model Heidi Klum and singer Seal arrive at the Vanity Fair Oscar Party at Mortons on March 5, 2006 in West Hollywood, California.

  • Heidi Klum & Seal

    Singer Seal, Heidi Klum their son Henry and Heidi's daughter, Leni, attend the match between Amelie Mauresmo of France and Maria Sharapova of Russia in the women's semi-final at the U.S. Open at the USTA Billie Jean King National Tennis Center in Flushing Meadows Corona Park on September 8, 2006 in the Flushing neighborhood of the Queens borough of New York City. Sharapova won the match in three sets.

  • Heidi Klum & Seal

    Model Heidi Klum and singer Seal arrive at the 64th Annual Golden Globe Awards at the Beverly Hilton on January 15, 2007 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)

  • Heidi Klum & Seal

    Singer Seal (L) and wife, model Heidi Klum arrive at Entertainment Weekly's 5th Annual Pre-Emmy Party at Opera and Crimson on September 15, 2007 in Los Angeles, California.

  • Heidi Klum & Seal

    TV personality Heidi Klum and singer Seal arrive at the 59th Annual Primetime Emmy Awards at the Shrine Auditorium on September 16, 2007 in Los Angeles, California.

  • Heidi Klum & Seal

    German top model Heidi Klum poses with her husband, British singer Seal, as they promote the presentation of the new Volkswagen Tiguan car, 27 September 2007 in Berlin.

  • Heidi Klum & Seal

    Musician Seal and Heidi Klum pose at the 5th anniversary of Butter on November 5, 2007 in New York City.

  • Heidi Klum & Seal

    Musician Seal and wife model Heidi Klum kiss on the runway following their performance at the 2007 Victoria's Secret fashion show held at the Kodak Theatre on November 15, 2007 in Hollywood, California. The show will be broadcast December 4, 2007 on CBS.

  • Heidi Klum & Seal

    Model Heidi Klum (R) and husband musician Seal attend the 2007 Victoria's Secret fashion show after party held at the Renaissance Hollywood Hotel on November 15, 2007 in Hollywood, California.

  • Heidi Klum & Seal

    Singer Seal and wife Heidi Klum arrive on the pink carpet for the 2007 Victoria's Secret Fashion Show, 15 November 2007 at the Kodak Theatre in Hollywood, California.

  • Heidi Klum & Seal

    Model Heidi Klum and husband/singer Seal arrive at the 80th Annual Academy Awards held at the Kodak Theatre on February 24, 2008 in Hollywood, California.

  • Heidi Klum & Seal

    Musician Seal and Model-TV Personality Heidi Klum arrive at the 66th Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 11, 2009 in Beverly Hills, California.

  • Heidi Klum & Seal

    Musician Seal and wife actress Heidi Klum arrives at the 81st Annual Academy Awards held at Kodak Theatre on February 22, 2009 in Los Angeles, California.

  • Heidi Klum & Seal

    Singer Seal and television personality/model Heidi Klum arrive at the Los Angeles Premiere and Conference 'Get Schooled' at Paramount Studios on September 8, 2009 in Los Angeles, California.

  • Heidi Klum & Seal

    Supermodel and TV host Heidi Klum and singer Seal arrive on the red carpet for the 2009 Emmy Awards at the Nokia Theater in Los Angeles on September 20, 2009. Period drama 'Mad Men' and network comedy '30 Rock' scooped top honors as the 61st Emmy Awards produced a virtual repeat performance at the television industry's equivalent to the Oscars.

  • Heidi Klum & Seal

    Singer Seal and model Heidi Klum attend the InStyle and Warner Bros. 67th Annual Golden Globes post-party held at the Oasis Courtyard at The Beverly Hilton Hotel on January 17, 2010 in Beverly Hills, California.

  • Heidi Klum & Seal

    Model Heidi Klum and singer Seal arrives at the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California.

  • Heidi Klum & Seal

    Heidi Klum (L) and singer Seal attend the Fox Broadcasting Company, Twentieth Century Fox Television and FX 2010 Emmy Nominee Party held at Cicada on August 29, 2010 in Los Angeles, California.

  • Heidi Klum & Seal

    Seal and Heidi Klum arrive at the 62nd Annual Primetime Emmy Awards held at the Nokia Theatre L.A. Live on August 29, 2010 in Los Angeles, California.

  • Heidi Klum & Seal

    Seal and Heidi Klum attend Worldwide Orphans Foundation Sixth Annual Benefit Gala Hosted by Heidi Klum and Seal on November 1, 2010 in New York City.

  • Heidi Klum & Seal

    Seal and Heidi Klum attend the InStyle and Warner Bros. 68th annual Golden Globe awards post-party at The Beverly Hilton hotel on January 16, 2011 in Beverly Hills, California.

  • Heidi Klum & Seal

    Model Heidi Klum and singer Seal arrive at The 53rd Annual GRAMMY Awards held at Staples Center on February 13, 2011 in Los Angeles, California.

  • Heidi Klum & Seal

    Model Heidi Klum and Seal arrive at BritWeek Gala Dinner Honoring Timothy J. Leiweke and benefiting LA's BEST 'Joy of Reading', at LA Live Downtown Los Angeles on April 28, 2011 in Los Angeles, California.

  • Heidi Klum & Seal

    TV personality Heidi Klum and singer Seal arrive at the 63rd Annual Primetime Emmy Awards held at Nokia Theatre L.A. LIVE on September 18, 2011 in Los Angeles, California.

  • Heidi Klum & Seal

    Singer Seal and Heidi Klum attend the EMMY nominees celebration with FOX Broadcasting Company, Twentieth Century FOX Television, and FX at Fig & Olive Melrose Place on September 18, 2011 in West Hollywood, California.

  • Heidi Klum & Seal

    In this handout photo provided by Disney Parks, Heidi Klum and Seal celebrate Halloween Time at Disneyland on September 29, 2011 in Anaheim, California. The Halloween Time celebration at the Disneyland Resort, which features special attractions and entertainment, continues through October 31, 2011.

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