AITA for refusing to look after my Friends stepdaughter because her parents are too lazy.

I have a friend named Sarah who has a stepdaughter named Amy. Amy is 7 and is a sweet girl who does not want to be with her father. Her mother has died, and she is constantly attached to Sarah. <br><br>I recently saw Sarah for coffee, and I asked her how Amy is doing. I have known Sarah for some time now, and I have grown fond of Amy. She is a bright young girl who is very enthusiastic about life. <br><br>Sarah explained that Amy and her father are not getting along well, and that Amy considers Sarah her mother. Amy is constantly texting Sarah, and Sarah worries that Amy is not getting along well with her father. Sarah also revealed that Amy has been refusing to see her father for some time now, which is causing Sarah to worry about Amy's well-being. <br><br>Sarah then asked if I would look after Amy for the night so they could both relax. But I refused her. Amy is not my child, and I am not paid to look after her. <br><br>I also explained that I am not paid to look after her, and that it is Amy's father's responsibility to look after her, but Sarah and her husband insist that they both need a break from Amy.<br><br>I refused their offer, and I pointed out that it is Amy's father's responsibility to look after her. This caused an argument, and Sarah called me an asshole for not helping her.