She does not have to cooperate, HER house HER rules.
The thing is been there done that my parents were against snakes and I survived, it was their house and their rules and this is the way it should be and I respected that. I moved out at 18 traveled a lot, lived in different countries (so good thing I did not have a snake) and one day I settled down and starting collecting snakes than and now I have a room full.
If you are passionate now you still will be in 2, 5 10 or even 20 years from now.
It's not the end of the world.