After nearly 30 years of marriage, Mel Gibson’s wife, Robyn Moore, filed for divorce from the actor/director this week. Robyn cited “irreconcilable differences” as the reason for their separation in legal documents filed in Los Angeles on Monday.

And now we may know why.

Russian pop star Oksana Pochepa, 24, was photographed frolicking off Costa Rica with Gibson just weeks before his wife filed for a divorce and went after half of his $900 million fortune.

Pochepa says she is dating the 53-year-old father of seven and has insisted their relationship could be “strong and long-lasting.”

“This is serious and I hope that our union will be real and strong and long-lasting. We are different people, but Mel is a grown man and knows precisely what he wants and me too – I know what I want,” Oskana, whose nickname is “Shark,” reportedly said in an interview with The Sun on Wednesday.