Sandra Bullock Planning to Sue Jessie James?

If Jesse James keeps bad mouthing Sandra Bullock he's going to find himself in court facing a huge lawsuit.

One month after shocking accounts of her husband's wild cheating drove Sandra Bullock to file for divorce in April 2010, an emotional and repentant Jesse James appeared on Nightlineand claimed, "I still have hopes of saving some sort of relationship with Sandy."

Now it seems those sentiments were hollow, because the words Jesse has used over the last year to publicly describe his life with Sandra have been dipped in venom.

And his latest thinly veiled broad-side against her — when he sneeringly referred to how he had "married some Hollywood actress... I'm not what I became," during a recent appearance on the reality series American Chopper: The Build-Off — could end up hurting him where it hurts the most: in his wallter!

An insider tells Star magazine that while Sandra, 47, "has consistently taken the high road by never talking about Jesse since their split, I don't expect her to play the shrinking violet forever if his jabs have secretly been causing her emotional distress."

And she has a powerful weapon at her disposal to strike back. Sources tell Star she could hit Jesse, 42, with a defamation suit, with one legal expert tellign Star that "asking for $20 million in damages would not be out of the realm of possiblity."

Jacked from OK