Impulse (2008)

The gorgeous and sexy Claire Dennison is the successful manager of the advertisement agency Image Engine and married and in love with the middle-aged psychologist Jonathan Dennison. Their life is perfect but Jonathan is not good in bed, frustrating Claire's desires. When a colleague suggests Claire to fantasize with Jonathan to bring passion to their relationship and have kinky sex with her husband, she pretends to be a sexy Italian but Jonathan does not participate in the game, and Claire asks him "to play the Italian lover Roberto" in the future. When Claire travels in a job assignment, she sees Jonathan fashionably dressed and wearing a different hair style in the hotel lobby and she drags him to her room and has kinky sex with him. Then they schedule through e-mail a next encounter in New York; in the morning, Jonathan calls Claire in the cell phone and she realizes that the man on her bed is a complete stranger. Sooner the man stalks Claire and introduces himself to her as Simon Phillips; she discovers that the Simon is psychopath obsessed for her and jeopardizing her married life.