Did Kat Von D Cheat On Jesse James With Bam Margera?

The Bullock-James-Von D love triangle just gained another side and became a square. We always suspected that there was something more to Jesse James and Kat Von D’s split but  Bam Margera never figured into the equation until now.

According to a source in this week’s Star magazine, James broke off his engagement to Von D because “Jesse believed Kat had been getting it on with her longtime friend Bam Margera, and they had a huge blowup over it”.

A few weeks after Ryan Dunn’s death on June 20, “Bam went over to Kat’s LA home to hang out and talk, and he ended up spending the night. Jesse found out and questioned her about it, and Kat let slip something about how ‘Bam just can’t sleep alone.’ Jesse hit the roof when he heard that and accused Kat of cheating on him. They were barely hanging by a thread by then.”

Um, could this be karma? Sandra Bullock probably thinks so.

Their relationship was clearly doomed from the beginning. “Given his past history with Sandra, Jesse’s over-the-top jealousy when it came to Kat is almost laughable,” Star’s insider claims. Indeed