Did Bret Michaels Break Up Miley Cyrus' Parents?

Remember, last week, when we reported that Miley Cyrus' parents, Billy Ray Cyrus and Tish Cyrus, were getting a divorce? Well, thanks to the investigative work of some crafty US Magazine reporters, we now know why.

According to the magazine, 43-year-old Tish Cyrus was having a fling with Bret Michaels! (Yes, that Brett Michaels of bandana-wearing, womanizing, Celebrity Apprentice-fame.) Evidently, Tish "pulled out all of the stops" for Bret and "would always show up to the studio in tight jeans and revealing T-shirts and flirt shamelessly."

And while some Hollywood guys might be into the idea of having an open marriage, Billy Ray is evidently not one them and immediately filed for a divorce once he found out! Is Bret Michaels Sleeping With Miley Cyrus' Mom?

"Billy Ray was completely unaware of what was going on," said a source about the singer. (Maybe Billy now has a good reason to get out his guitar and reprise his hit, "Achy Breaky Heart?")

Supposedly, Tish and Brett met when he recorded a duet with Miley back in February, and the two began a professional relationship that turned into more, with Brett asking Tish's production expertise to help turn his book, Roses & Thorns, into a movie.

Billy Ray is reportedly "devastated" by the affair and is seeking custody of the couple's 3 minor children, including Miley, who is reportedly worth $150 billion. Miley Cyrus' Parents Are Getting Divorced

Sadly, "Billy Ray and Tish are already bickering over how to handle their most valuable asset - Miley," said an insider to Star Magazine.