Robin Thicke and Paula Patton's marriage began to unravel when - you guessed it - the entire world saw Miley Cyrus Twerking all over him at the VMAs.
Patton, who also famously praised his "Blurred Lines" video with a nude Emily Ratajkowski, put on a good front, insisting the Twerk-fest didn't bother her.
But it did. Sources say Patton felt "utterly disrespected" when Thicke virtually simulated sex with Miley Cyrus, and also by how he handled the fallout.
Paula got into a blow-out fight with Robin, telling him he insulted her before a national TV audience with that stunt, even though he didn't see it coming.
That's right, both Paula and Robin say Miley Cyrus Twerking on him was unplanned, an improvisation on her part. However, he ran with it, angering Patton.
It only went downhill after the buzzed-about show when Paula saw pics of Robin grabbing Lana Scolaro's butt, which she also downplayed at the time.
They argued constantly; Paula was furious that Robin kept partying with various women, very cozily at times and seemingly unconcerned with her feelings.
It reached the point of no return last week.
Robin Thicke and Paula Patton issued a statement that it was a mutual decision to amicably separate, but it was the actress who wanted to pull the plug.
Twerking aside, it was a shock to their fans.
The two have known each other since they were teens, have been married since 2005 and have a young son, Julian. Their relationship felt rock solid.
Guess they were good at fooling the public.
Robin flew to Canada to try to change her mind, and is still pulling out all the stops - i.e. not going out anymore - to show her he's a good husband.
Could be too little, too late for her, though, from the sounds of it. After all, how does one manage to bounce back from a series of incidents such as ...
1. Robin Thicke Grabbing Ass?
Is that Robin Thicke grabbing a fan's ass? Check out the reflection and you tell us.
2. Emily Ratajkowski and Robin Thicke
Emily Ratajkowski and Robin Thicke in his music video for "Blurred Lines." He likes what he sees, clearly.
3. Robin Thicke, Nude Models
Robin Thicke and nude models cover Treats! Magazine. Which is apparently a thing.
4. Miley Cyrus VMA Twerk
This may have been a Twerk too far. Miley Cyrus is thrusting her rear end into Robin Thicke's crotch.
5. Robin Thicke - Blurred Lines ft. T.I. & Pharrell
Robin Thicke sings on "Blurred Lines" ft. T.I. and Pharrell.
6. Miley and Robin
Miley Cyrus does her thing here on stage with Robin Thicke. Her very controversial thing, we should say.
9. Miley Cyrus, Robin Thicke
Miley Cyrus and Robin Thicke performing at the 2013 MTV Video Music Awards.
11. Robin Thicke - Blurred Lines (Unrated)
Music video by Robin Thicke performing "Blurred Lines." With nude models in the house. NSFW.