grumpy butt!

My daughter just came home from her dad's house for Thanksgiving and she is grumpy because he made her bring her cat home because it had gotten pregnant there and he didn't want to deal with her getting pregnant and so he sent her home. Problem at home is she is a bird killer and with 2 parrots in the house we can't have a cat in the house, so she is an outside cat. Now I have a teen who is upset because her cat is outside, not considering it was a barn cat at her dad's house and was outside about 90% of the time there, which is how she got pregnant in the first place. When the cat was here no matter how much you cleaned the litter box she still sprayed here and I can't have that here. Now I'm a bad mother because i won't let her cat in the house to pee and kills my bird and her bird. I'm sorry but i just can't do it.