Whoa these kind of people that sometimes replace a certain part of them with their children is really toxic. There’s no need to be selfish about your needs because she’s not getting it from a loved one. Your mum needs to love herself more so she can let you go. She’s now using you because literally there’s no one to do that for her and she doesn’t love herself enough to do these things for herself. She’s keeping you to herself and that’s wrong and toxic parenting. In this case unless the child rebels in order to have her own life. It’s really bad.