"Billy Ray was completely unaware of what was going on," a source says.
Bret became "close to the entire family" in February when he and Miley paired up for Nothing to Lose. That is when Tish and Bret started having an affair -- Rock of Love style -- on the sly.
Tish made a public appearance on February 28 with Michaels, showing up at his performance at the Key Club in L.A.
Billy Ray found out about the affair (and reportedly one other affair!) and filed for divorce on October 27, seeking joint custody of Miley, as well as 16-year-old Braison and 10-year-old Noah. "It was a professional relationship that turned into something more," says the source.
Bret's rep denies the allegations, saying, "There has never been an affair or a fling," as does Tish's rep.
I wonder what Kristi Gibson, Bret's rumored fiance and mom of their two children together, has to say about this?
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