Should I ask him?

My husband asked me if he could go midnight fishing with his cousin Saturday which of course I said yes. Well I went on his messages to get an address because we just moved out of Texas and they aren’t going fishing they are actually gonna be camping and drinking beer. I was kinda upset he lied because we never do anything together & I understand I couldn’t go at first because they will be on a small boat. But they aren’t even gonna be fishing and now I have to sit at his grandmas boring house for a night while he is having fun. Should I be mad? Should I ask why did he lie?