I would say that you know your parents. I think everyone can at least know if pushing the issue with their parent is either going to be a complete neg. experience or if its a possibility to push them into getting it.

I understand the whole "feeding the live animal to another animal" thing. Some ppl just can't handle it or the thought. I always wanted a bp and worked up the stomach to do the deed, so to speak. 9 snakes later and I'm still not at ease at doing it, but I do not regret getting them at all.

Sometimes parents can't comprehend some of those things. I know my dad was easier to try to push over. Since its a snake, I would talk to your dad and see if he can win over your mom on the idea. You might not be able to feed your snake when shes home, but hey you would get what you want. lol.