H - My X did the same thing with wanting to sign my oldest up for math tutoring that was going to cost $255/mth. I told her I could not afford the extra expense due to the child support I was already paying and a couple of other things that I agree to take on in our D settlement. She came back and told me she would be able to afford it.
If she does not ask your opinion then reject them. Eventually she will learn to ask.
