Credit: Jason Merritt/Getty; Scott Harrison / Retna Ltd.

Michelle "Bombshell" McGee isn't done bad-mouthing former paramour Jesse James, 41. Her latest dig? His below-par bedroom prowess.

While chatting about their 11-month affair, that took place while he was married to Sandra Bullock, on The Wendy Williams Show Tuesday, McGee snipped that their sex sessions were "average," and that their first encounter -- when she came to his office presumably to interview for a modeling gig -- was less than smooth.

"It was kind of weird…he asked me to sit on the couch next to him and watch a movie," said the mom of two. "It was very 12-year-old and he kind of did the whole like reaching around and that’s where he started kissing me…it was very awkward."

And while she may not be impressed with James' skills, McGee -- who says she is bisexual -- wouldn't mind getting close with his ex-wife.

"I love Sandra Bullock I’m a huge fan," said McGee, who was photographed licking a photo of the Oscar winner. "She's hot. She's really cute."

McGee has less kind words for James' new fiancee Kat Von D, 28.

"Kat, run for your life!" she said. "He is a cheater. You cannot change a man. You know you cannot change a leopard's spot. Once a cheater always a cheater. He cheated on a beautiful woman like Sandra Bullock, like, what makes you think he's not going to cheat on you."