We broke up and his mother sent me a message. How should I reply?

Ha ha! His mother sent you a message that his family still accepted you, which also showed that your boyfriend realized his mistake, but he was too proud to ask his mother to send you a message. Here, you must first analyze your feelings. If you still love each other, then you have to find him a step. Tell your future mother-in-law that you don't want to dispute with him, but he really went too far. If he realizes his mistake, let him personally apologize to you. In this way, I expressed my meaning, and secondly, I narrowed the distance with my future mother-in-law. If you think it is impossible between you, you can only say it directly, which will save misunderstanding and trouble!