My(24M) GF (27F) refused to allow our newborn to go to daycare. She would only be agreeable if it was her mom or her sister that watched our daughter. My GF made a deal with them that they could live with us and they would be paid $500 a month which is the average cost of daycare in my area. I was told I would be paying them because the mom had lost one of her two jobs and needed the money. I was not agreeable to this but as the father I was told I had no say. They are alternating who would be watching my daughter, with my GF mom watching her Monday-Wednesday and the sister Thursday-Friday for about 6-7 hours a day. This agreement has raised our food bill, water bill and electric bill by around $600/month total. I made a comment that we should have just put my daughter in daycare and would be saving about $7200 a year. I told my GF she was responsible for their pay and the cost different in our bills. I do make about 3x more than my GF but I shouldn’t be obligated to pay expenses which could have been regulated because my GF choose that I had to. AITAH for making her pay her sister/mom and the increase in bills?