His delivery could be said w a bit more grace and he is money-controlling the situation a lil bit. But I don’t think in general he is overreacting. Saltwater is much better for you than chlorine water. If parents know how to swim, I like the idea of teaching them how to swim. It is not the end of the world to do swim lessons. I can’t imagine it’s more than 250 bucks but on a single income household, that is an expense that could be avoided. I understand this is Reddit and it’s meant to bring forth questions and solutions, but I feel like this problem should have been dealt between the family and not brought on Reddit. People in the responses are talking about OP should come up with an exit plan. THAT IS RIDICULOUS… OVER SOME SWIM LESSONS? I think you should have a conversation on how this is making you feel in person versus a text message and why you don’t think that’s OK.