Bothered mother in law

So me and my boyfriend of 5 years have 2 little girls 3 years old and 2 month old well we got into a big argument last week and I called his mom asking for him because it was late already and she said he was outside but yet he wouldn’t answer my calls so I was already mad because of that but she was like covering up for him or something anyways she sped me to him and he told me he was in the other room but his mom told me something else anyways he got home to me like at 1 am and said I can’t be calling his mom and yelling at her which I didn’t I know how to respect people especially my mother in law so we argued because of that like a big argument anyways the next day he didn’t talk to me and then at night he gets home and ask for his cash the one I have saved in our drawers so I give it to him and we still don’t talk it’s like 2 days later well yesterday we finally talked and we ordered pizza and he said can you pay with your card cause I don’t have cash with me and I said well what happened to the 1000 something and he said it’s in the bank I said what bank you don’t even have a card or a bank account it’s only me that has one and he said the chase bank so I said what and he said my mom has the money in her account ... I was like wtf that’s our money for extra or whatever and he said yea my mom has it and he starts to smile and laugh so now I have my card and his mom has his money I don’t work only he does and he gets paid in cash so am I wrong for being bothered by this that his mom has the money and he didn’t put it in my bank account cause we live together? What y’all think