What I don't understand is why my sister refuses to cook supper. Like ever! She expects me to cook…

What I don't understand is why my sister refuses to cook supper. Like ever! She expects me to cook when I'm busy at the time that supper is needed to get cooked and eaten. That is my son's bed time. I can't get him ready for bed and get supper made and everything every damn night. She pays my utilities and that's it. 100 dollars a month is all she has to pay and she can't make supper a couple nights a week to help me out? I would understand if my husband and kids were eating it too but it's just me, her, our brother, and maybe our dad. It also makes me mad that my dad says he can't cook all the time cause of his heart attack that happened back in '12. Bullshit!