Mine has cheated 5 times I know of. He changes from a good person to someone I don’t know. I’ve learned he gets in a narcissist circle and is addicted to the dopamine he receives from sneaking and lying. He will not change without help and accountability. I have finally made the decision to divorce him and move to a happier life. I plan to see a lawyer asap to find out what steps to take. If your husband is a serial cheater I would advise you to get out now. They won’t change until they are ready to. The pain is unbearable. Life is too short.