Britney Spears' father thinks Kevin Federline is spending child support money on his 4 other kids

Kevin Federline has two kids with Britney Spears and four more with other women -- and if he's not spending his child support checks properly, that could pose some new problems for him in court.

Kevin is requesting an increase in child support cash from ex Britney, who currently sends him $20,000 a month to help with sons Jayden James and Sean. But Britney's father, Jamie Spears, isn't convinced that the $20,000 is exclusively going toward their shared kids.

40 PHOTOS
Britney Spears and her kids Sean Preston and Jayden James
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Britney Spears and her kids Sean Preston and Jayden James
Love when we go to our favorite spot on Sundays πŸ’•πŸ₯ž The boys are bigger than me now!!!!! 😜
Painting feels so therapeutic to me! Getting to do this with my boys on a beautiful day like this is such a blessing!!!
This was from our lil trip to see Aladdin. What a great show!!!!
πŸ πŸ¦‹πŸ  So much fun at this beautiful place
Me and my boys enjoying the warm weather!!! πŸ•ΆπŸŒ΄πŸŒŠβ­οΈ
Jumping for joy because school is out for the holidays!! πŸŽ„
Enjoying the holiday break! πŸ‘ŸπŸŽ
Going for a walk with my son and the dog always does wonders for my mood...
YES! JOY IS ALL AROUND! πŸŽ„πŸŽπŸŽ„
My favorite boys at my house for Thanksgiving!!!! πŸ¦ƒπŸ¦ƒ
I did this shoot two years ago with my friend @glennnutley... I remember being on my knees, making sure my sons’ hair stayed straight!! #FBF
Dinner with the boys!!! πŸ”πŸ”πŸ”
I took these photos of my children before my trip this summer… looking back at the photos I've taken of them, it brings me to my knees everyday to see how blessed I am to have such amazing and inspiring kids!!!!! Let’s stay inspired y'all!!!!! ❀️
My boys!!! #tbt
Brushy brushy brushy!
My son looks so handsome with his new haircut πŸ’‡β€β™‚οΈπŸ’‡β€β™‚οΈπŸ’‡β€β™‚οΈπŸ’‡β€β™‚οΈπŸ’‡β€β™‚οΈ
Before Sky Zone!
Miss my boys πŸ’˜πŸ’˜
Who wants to go to Texas? ☺️
No homework! Best day ever!
Right before the boys went to their play last week β˜ƒοΈβ˜ƒοΈβ˜ƒοΈ #tbt
Family time β˜€οΈ
My son received an award at school today for being the best encourager!!
❀
The socks πŸ˜‚πŸ˜‚πŸ™ŠπŸ™ŠπŸ’œπŸ’œπŸ’œπŸ’œπŸ’œπŸ’œ
Photos of my boys taken about a year ago. They're such lovely young men. It's simply the sweetest gift being a mother
Beautiful parrot in Hawaii!
The boys with @kennybritt18! Vote for him for Pro Bowl!! ☺️
Church with the family!
My son has blue hair!! Wheeee!
Goodbye Hawaii 😒 so sad!
Great Vegas trip!
The boys and I saw @disneythejunglebook this weekend and we give it ⭐️⭐️⭐️⭐️⭐️⭐️⭐️
Time for a haircut!
Fun in Vegas!
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Jamie is preparing to demand Kevin's 2017 tax return, according to TMZ, and the document will shed more light on how he's been spending those checks. It may prove that Kevin has been putting that annual $240,000 toward all six of his kids, and possibly other expenditures as well.

Sources say Jamie would be willing to delegate more money per month if a judge determines Jayden James and Sean need it, but he doesn't want the money to support anything other than the boys.

Kevin's other kids come from ex Shar Jackson and wife Victoria Prince. He and Britney were married from 2004 to 2006.

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Britney Spears and Kevin Federline together
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Britney Spears and Kevin Federline together
AMSTERDAM, NETHERLANDS - MAY 6: (UK, US AND CANADA RIGHTS ONLY) Pop superstar Britney Spears and new boyfriend Kevin Federline spend time together in Amsterdam on May 6, 2004 in The Netherlands. Federline is a dancer and the pair have apparently been friends for a while ahead of becoming a couple. (Photo by Dennis van Tellingen/Bruno Press/Getty Images)
Kevin Federline and Britney Spears at the MGM Grand Garden in Las Vegas, Nevada (Photo by Kevin Mazur/WireImage)
LAS VEGAS - DECEMBER 8: Singer Britney Spears and husband Kevin Federline kiss as they arrive at the 2004 Billboard Music Awards on December 8, 2004 at the MGM Grand Garden Arena, in Las Vegas, Nevada. (Photo by Frazer Harrison/Getty Images)
Britney Spears and Kevin Federline during 2004 Billboard Music Awards - Red Carpet at MGM Grand Garden in Las Vegas, Nevada, United States. (Photo by KMazur/WireImage)
Britney Spears and Kevin Federline (Photo by Mel Bouzad/FilmMagic)
Britney Spears and Kevin Federline at the Chinese Theatre in Hollywood, California (Photo by Jeffrey Mayer/WireImage)
(EXCLUSIVE, Premium Rates Apply) Britney Spears and Kevin Federline (Photo by James Devaney/WireImage)
Britney Spears and Kevin Federline (Photo by Kevin Mazur/WireImage for People Magazine)
Kevin Federline and Britney Spears with guests during 12th Annual Screen Actors Guild Awards Official After Party hosted by People Magazine and the Entertainment Industry Foundation at Shrine Auditorium in Los Angeles, California, United States. (Photo by
Kevin Federline and Britney Spears during Rolling Stone/Verizon Wireless Pre-GRAMMY Concert with Kanye West - Arrivals at Spider at Avalon in Los Angeles, California, United States. (Photo by Jason Merritt/FilmMagic)
Kevin Federline and Britney Spears during Rolling Stone/Verizon Wireless Pre-GRAMMY Concert with Kanye West - Arrivals at Spider at Avalon in Los Angeles, California, United States. (Photo by Jason Merritt/FilmMagic)
HOLLYWOOD - FEBRUARY 08: Singer Britney Spears (R) and husband Kevin Federline arrive at the SONY BMG Grammy Party held at The Hollywood Roosevelt Hotel on February 8, 2006 in Hollywood, California. (Photo by Vince Bucci/Getty Images)
Kevin Federline and Britney Spears (Photo by Larry Busacca/WireImage for Sony BMG Music Entertainment)
Kevin Federline, Britney Spears and Tyra Banks (Photo by George Pimentel/WireImage for Ogilvy Public Relations)
Kevin Federline and Britney Spears during Belated Birthday Party for Kevin Federline with Britney Spears Hosted by Scooter Braun - Arrivals at Vision Nightclub & Lounge in Atlanta, Georgia, United States. (Photo by Ben Rose/WireImage)
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