I wld get annoyed too if my MIL or even my mom enrolled my son in a class without asking me first. While her intention is good, she shld have at least got ur and ur hubby's opinion first since different parents have different interests in mind for their kids. Try to speak to ur hubby abt your grievances so tt he can talk to his mother abt it and to avoid such thing from happening again. It may cause further tension if u were to confront her directly. Anw since this has happened, you may want to just let ur boy go for the trial class first so tt ur MIL cld see tt u actually respect her decision so she shld do the same for u next time (: