My bf gave our cat away. I'm heartbroken.

Ana
My bf gave our cat (technically his daughters cat) to his ex wife. She is leaving for vacation for 10 days and the kitty will be in a strange home alone. He did it while I was at work and was too much of a coward to be home to face me when I found out. I was so outraged I broke up with him and threw him out of our house. There are a lot more details leading up to this but basically this is what broke us. He did it to avoid conflict with his ex and satisfy his 9 year olds temper tantrum when she wanted the cat at her mother's. I loved that cat with all my heart and I loved him. I'm so angry and so heartbroken I can hardly take it.