Feeling so offended

So my boyfriend of 6 months invites me to his little nieces 4 year old birthday at an indoor play centre. He already has a 4 year old daughter from a previous relationship. A 4 year old daughter. He goes off with his daughter when he comes back he asks if I could keep in my bag 2 little crap toys they won in a vending machine then he turns to his mother who is standing next to me, and aska her to keep his wallet in her bag and his daughters Pandora bracelet. I was so taken back by the utter rudeness. I was so offended that I just wasn't myself for the rest of the day. I sleep over his house 3 days a week. I go out of my way every Sunday to spend time with him and his daughter yet he can't trust me with his wallet. WTAF 😐