HOMEWRECKER: Robin Thicke & Paula Patton Split, Triggered By Antics with Miley

Robin Thicke’s marriage fell apart when he dry humped Miley Cyrus on stage before a national audience … humiliating his wife.

Sources connected to the couple tell TMZ … Paula Patton felt “utterly disrespected” when Robin virtually simulated sex with Miley the night of the VMAs.  We’re told after the performance Paula got into a blow-out argument with Robin, telling him he insulted her before a huge national TV audience.

What really pissed Paula off is that the performance was a total surprise.  Miley improvised the raunchy part without warning, but Robin played along … and that enraged Paula.