Honestly, did anyone see that coming?
Well, we did.
Back in May we spotted pictures of Kristen and her alleged lover having dinner together minus R-Pattz.
However, we will admit, we never imagined they were anymore than friends.
Kirsten, who is 22, is believed to have cheated on Robert twice with Rupert Sanders who directed her latest flick, 'Snow White and the Huntsman'.
While we find it hard to believe, a US magazine has printed photos of the Twilight starlet in a cuddle with the director that, as much as we try, we can't just dismiss.
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Rupert is married to model, Liberty Ross and the couple have two children together. It's believed K-Stew regrets the whole thing and wants to move on.
These claims come just after Rob hinted that the couple might be headed for marriage, saying: 'Kristen has always done something to me that others haven't'.
The actor has expressed in the past how he can never understand cheating:
"There is one thing I've never understood: Why people cheat. My parents met when my mom was 17 and my father 25, they are still together, and seem very happy."
"I grew up believing that you can be together all of your life."
We really hope it's all just a misunderstanding.