Homer and Marge look like a loving couple. Has any one of them committed adultery and cheated before?
2 Answers
To my knowledge, the closest that Homer ever came to cheating on Marge was in The Last Temptation of Homer. The closest that Marge ever comes to cheating on Homer would probably be in Mommie Beerest or Life on the Fast Lane. Disclaimer: I think I've missed the last few seasons.
Homer and Flanders both committed bigamy in the season 10 episode Viva Ned Flanders when they each drunkenly married cocktail waitresses.
Whether the marriages were consummated is unknown, but bigamy itself is cheating.