The Technical Writer (2003)

Drama - Slim (Tatum O'Neal) and her husband, Joe (William Forsythe), live in a posh Manhattan apartment building. Also a resident is Jessop (Michael Harris), a hermit whom Slim can't wait to integrate into her circle of friends, which happens to be known for its swinging lifestyle. Jessop isn't interested, but Slim eventually changes his mind -- and manages to seduce him, to boot. Just as soon as she reels him in, however, she spits him right back out. - Michael Harris, Tatum O'Neal, William Forsythe