simon-cowell-lauren-silverman.jpgSpread Pictures

Yesterday the news broke that Simon Cowell had fathered a child with Lauren Silverman, the wife of his former best friend, Andrew, and now it's been revealed that Andrew Silverman named Cowell in his divorce papers!

Silverman filed the legal documents in New York City two weeks ago, and he cited adultery and named Cowell as a co-respondent. This means Cowell could be called in as a witness and forced to reveal details his affair with Lauren, and he may even have to disclose financial information.

"It's really a signal to the spouse who cheated that the wronged spouse is very angry and that it's going to be a very nasty, scorched-earth, high-profile litigation," divorce attorney Martha Cohen Stine told the New York Post. Maybe Simon can lend Lauren some money? He's worth an estimated $320 million...

The papers cite sources who claim Andrew and Lauren "weren't estranged" when Lauren began her relationship with the music mogul, and it even seems like there was something going on when we snapped the three on vacation in St. Barth back in January of 2012.

Andrew's brother, Alexander Silverman, tells the Post, "It is an unbelievable story of betrayal. It is a sad story and a tragic story."

Wonder how much it's going to cost Simon ... and Lauren?