Britney Spears' former brother-in-law says he is the real father of the controversial pop star's seven-year-old son Sean Preston, according to reports.
According to RadarOnline, Kevin Federline's brother Christopher said in court documents that Spears stole his credit card from his wallet.
It is alleged that Spears found the wallet on Kevin's table when she visited his house to pick up her two sons.
"[Britney] blackmailed me and told me if I tell the police that she stole my credit card, that she will tell the world I'm the true father of Sean Preston, not Kevin," Christopher said in court documents.
"I do confess I slept with Britney, and I am the true father, but the public does not need to know."
Christopher said he had an affair with Spears while she was married to his brother.
He now says she is "out-of-control and a maniac" and spent $4500 on his credit card.
"[Spears] laughed at me [and] told me my brother Kevin ruined her life. Britney made fun of me and told me I have a small penis," Christopher said.