http://www.imdb.com/title/tt0159099/
Plot:
Programmer John Lewis is assigned to work out the bugs in the virtual sex program Virtual Girl, a job that he considers beneath him. Virtuality, the permanently sexually available female AI inside the program, offers herself to him but he has no time for her. But due to his own wife Karen’s disinterest in sex, he soon finds himself being tempted. But then Virtuality starts acting possessive and causing trouble that is clearly designed to split he and Karen up.