Well perhaps this is why he isn't in such a rush to put a ring on it?...
People and US Weekly are both reporting (and have pics to prove it too!) that Kristen actually cheated on Rob with her 'Snow White and The Huntsman' director, Rupert Sanders. Making matters worse, Rupert is a married man with two kids!
Really Kristen?
Apparently K-Stew and Rupert just had a hardcore make-out session while taping the movie and both regret it terribly.
Poor R-Patz.
Get the full story and see the steamy pictures here!
UPDATE: Kristen has released a public statement admitting guilt and an apology to Rob too. Read it here!
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