Question: what to say to someone after they cheated on you?
Answer: "I didn't intend to hurt you." ...  "You weren't meeting my needs." ...  "I need time to decide." ...  "Monogamy isn't natural." ...  "But I loved you all along." ...  "I would try to reconcile, but you're never going to forgive me." ...  "I need to mourn the end of the affair."