(Getty Images)

(Getty Images)

LOS ANGELES -- Sandra Bullock's husband Jesse James may have cheated on the Oscar-winning actress with several women and searched online to find well-endowed biker chicks, according to recent reports.

Sources tell Us Weekly that tattoo model Michelle "Bombshell" McGee is just the first person to come forward alleging an affair with James.

The magazine reports that James, 40, would regularly post Internet ads looking for "hot, tattooed biker chicks with big boobs," and then invite the girls back to his West Coast Choppers bike shop in Long Beach.

James' infidelity has been an openly-known secret among employees at the bike shop, the magazine says, adding that James "gets bored" when Bullock is away.

A former high level, female executive with the bike shop also settled a sexual harassment claim against James and West Coast Choppers for $725,000 in 2007, while he was married to Bullock, TMZ is reporting.

The woman, who kept several suggestive emails, said that between 2006 and 2007, James repeatedly made sexual advances, which allegedly included sexual acts, the site reported.

In the settlement documents, James reportedly neither admitted nor denied the allegations.

James apologized for using "poor judgment" and asked his family to forgive him following revelations by McGee that the two had a year-long affair while Bullock was away filming "The Blind Side."

McGee claims to have the sexy text messages to back up her claims.

According to the NY Daily News, the text are now in the hands of In Touch Weekly.

Some of them are dated as recently as March 14 - just days after Bullock won her Best Actress Oscar with her proud husband by her side.

In his statement, James, a custom motorcycle manufacturer and reality TV star, took responsibility for his actions but stopped short of admitting that he had an affair with McGee.

"It's because of my poor judgment that I deserve everything bad that is coming my way," James said in a statement to People.

"This has caused my wife and kids pain and embarrassment beyond comprehension and I am extremely saddened to have brought this on them. I am truly very sorry for the grief I have caused them. I hope one day they can find it in their hearts to forgive me."

The apology came one day after Bullock abruptly dropped out of the London premiere of her film "The Blind Side," due to "unforseen personal reasons."

Warner Brothers released the following statement from the Academy Award winning actress:

"Due to unforeseen personal reasons a trip abroad to support "The Blind Side" has been deemed impossible at this time. I apologize for any inconvenience this may have caused and thank you for your continued support of the film."

Bullock has reportedly moved out of the home she shared with James. A representative for the actress denied reports that both she and James have been shopping around for divorce lawyers.