I am not as forgiving as some of the people who have posted in this thread. There is no excuse for what your mother did, especially when the Vet didn't even want to do it. Even if she thought she was doing the right thing she should have consulted you and given you the chance to take Selena in. I'm so sorry that this has happened to you. I know how it feels to be betrayed. I hope you can come to terms with this.
RIP Selena.
You're in safe hands now.
RIP Selena.