The 5 Mrs. Buchanans

Season 1, Episode 2: The Other Woman

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When newlywed Bree's lovelife becomes non-existant (since her husband, Jesse, can't get aroused in the same house with his mother), they decide to stay with Alex. This invigorates their sex life temporarily, but Jesse soon begins leaving the house early and coming home late, leading to suspician that he's with another woman. But no one ever dreamed that the other woman would be Mother Buchanan!