Jesse James's other mistresses: Is he the new Tiger Woods?

Sandra Bullock always believed that Jesse James had her back. But turns out he was doing way more behind it than she ever imagined.

According to Us Weekly, Michelle 'Bombshell' McGee was not his first or only fling. She's just the first to go public. And everyone knew about Jesse's cheating ways except Sandra.

"This is just the first person who has gone public," says the Us Weekly source. "This is not an isolated incident."

In fact, James' infidelity was common knowledge among mechanics and workers at his West Coast Choppers bike shop in Long Beach, Calif. The mag says James would post Internet ads looking for "hot, tattooed biker chicks with big boobs. "He sees their photos, answers the ads and invites the girls to his office," says a source.

Even his ex-wife, a tattooed porn star now in rehab, is singing the same 'cheating man' song. Janine Lindemulder is currently in an Oregon half-way house and has lost custody of her daughter, who was being raised by Sandra and Jesse.

"I feel sorry for Sandra because she was so in love with Jesse that she was blind and gullible," Janine tells InTouch. She once said, 'I finally have a man who has my back.' And all I could think was, 'No. You have this man who does it behind your back.'"

According to Janine, she first learned Jesse was unfaithful just weeks into their marriage, when he accidentally sent her a sext message meant for another woman.
 
Janine even had phone sex with Jesse when he was married to Sandra because he was so hard to say no too. "His famous line was, 'Tell me something nice,'" Janine recalls. "He would say he'd had a rough day and wanted you to tell him something nice."

Janine says he called her two weeks after he and Sandra got married said their vows. "He said, 'I want to come up to Oregon. I think I made a huge mistake.'"

Wonder if we'll get another apology (with disclaimers) from Jesse about this week's revelations.
 
What would you do if you were Sandra?  Divorce him, pull a Lorena Bobbitt or both?

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Michelle Bombshell McGee claims affair with Sandra Bullock's hubby Jesse James

Photo credit: Us Weekly, In Touch