OK! EXCLUSIVE: Sandra's New Life

This time, Sandra Bullock is not falling for Jesse James' lies. Though he's been begging and pleading for her to excuse his behavior, the Oscar-winning actress is moving ahead with her plans to cut him out of her life.

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"Sandy's made up her mind to divorce him," says a friend. "Her family is 100 perfect behind her decision."

But it hasn't been easy. The extent of Jesse's betrayal with as many as seven women throughout their five years of marriage shook Sandra, 45, to the core.

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"He didn't just cheat on her. He's totally, utterly humiliated her, and that's unforgivable," an insider adds. "The marriage is beyond repair, however hard Jesse tries now and in the future."

"Jesse apologized over and over," another friend close to Sandra tells OK!.

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Jesse, 40, claimed his self-doubt drove him to cheat. "He said he had a lot of insecurities about being her husband," says Sandra's close friend.

"He's actually relieved that Sandra knows everything now because he couldn't keep up with all the lies, and the anxiety was making him sick," says the friend. "Now he's asking her to be the bigger person and keep their family together."

OK! NEWS REPORT: JESSE JAMES' KIDS LIVING WITH SANDRA BULLOCK

But Jesse's pleas have fallen on deaf ears. She talked to each of the kids — Chandler, 15; Jesse Jr., 12; and Sunny, 6 — about the split and promised she'll always be a part of their lives.