Honey, I'm sorry you are in this position and you are right - we don't know the whole complicated story. But frankly, your sister has a point. And if she is taking care of your snake under her roof, she has the right to know and she SHOULD know. You are putting yourself, your boyfriend, and your snakes (all of them) in a very precarious position. I wish you the best, I really do, but I don't feel there is much else we are going to be able to help you with. This really is turning soap-opera. Maturity takes many forms and sometimes the mature and responsible thing to do is not the thing you want to do. But that doesn't mean you shouldn't do it. Good luck!