This finale, though titled "Love Triangle," deals with the protagonist (Belly) making a final choice between two brothers, effectively "choosing" one while fearing the loss of the other, a common emotional parallel to the "enemy/lover" trope. Sleeping with the Enemy Recap - Bad Movie Twins
Below is an analysis of this episode, alongside other notable media frequently associated with this specific title.
While not an episode, the film Sleeping with the Enemy (1991) starring Julia Roberts is the definitive source of the "abusive husband/faked death" narrative.