Wtf!!

So my boyfriend n I stay together he has custody of his son and I have three kids one by him that’s 6 months he don’t pay no bills he don’t help me at all financial wise! His son stay with us n he buys his son McDonald’s happy meals everyday when he gets out of school which is at 2:30 my kids get it of school at 3:45 pm so anyways they came home one day to his son eating McDonald cause he didn’t eat it right away when it was bought (which was the lie he said ) teasing them etc I didn’t say anything at first but now it’s getting Annoying cause he don’t buy my kids nothing at all so when I addressed it he said that his son gets out of school before my kids that’s why he buys him McDonald’s cause he be hungry and he said that nobody gonna stop him from feeding his kid rather my kids sees it or not so after that when I come home from work n my kids come home from school we w McDonald’s boxes and wrappers around around so while the kids was playing the son was like I’m not hungry cause my dad bought my McDonald’s today and I was confused like where’s the papers at the wrappers it wasn’t in the trash etc so now he’s hiding the food wrappers n boxes I’m irritated Smh ... what would u do or say I didn’t confront him yet 🤔🙄