I hate that I can't spend my own money on our kids without my bf throwing a fit!! it's like it was…

I hate that I can't spend my own money on our kids without my bf throwing a fit!! it's like it was my car that was totaled not yours.. Wanted to do a silly art project with my daughter this weekend before Kailynn got here, and buy a few things for Kailynn we still needed... he is throwing a fit of 70$ like really... you just spent over 80 on a stupid mouse for the computer!! a useless mouse.. at least my money go towards something!!