Beyond the black flags in their relationship, I bet it'll be a funny scene when they have kids who are already teenagers.
He is tough just not tough enough and needs to be tougher.
Authors, if you're going to be writing stories about vengeance make sure your MCs would see it through the end and not for them to have second thoughts and abandon everything for the sake of forgiveness.
Beyond the black flags in their relationship, I bet it'll be a funny scene when they have kids who are already teenagers.