Michelle "Bombshell" McGee

Michelle "Bombshell" McGee says she carried on an 11-month-long affair with Jesse James out of "boredom."

"Had nothing better to do," she told Howard Stern on his Sirius XM radio show Wednesday. "It was a sexual thing. I also wished it was a relationship — but I wasn't in love with him."

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After meeting on MySpace, McGee said James invited her to his West Coast Choppers motorcycle shop, where they ended up having sex on his coffin-shaped couch. They had sex up to four times a night twice a week, she said, but she would not say whether James, 41, wore a condom. "That's just too personal," she said. "I was on birth control pills, so I wasn't afraid of getting pregnant."

McGee said she never saw the home James shared with now-estranged wife Sandra Bullock, and reiterated her previous claim that James told her that he and Bullock were separated. The only time Bullock came up in conversation was when they watched her on TV once, McGee said.

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"I feel bad for her. I do," she said. "[But] they slept with nine dogs in the bed ... she liked to sleep with all the dogs in the bed."

Bullock, 45, filed for divorce from James last month.

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Though she believed James and Bullock were already separated, the tattoo model said she never expected to marry James because the most she ever got out of their affair was a T-shirt he gave her that "had wolves on it."

"I couldn't even get him to take me out for pizza," McGee said. "Of course he wasn't going to marry me."