I did the same thing as you when I was a kid. My mother is terrified of snakes and despite having wanted one since I was a baby I was not allowed to keep one. Eventually my dad found my snake and gave him to some random dirty pet store and I was kicked out of my house for several weeks. I was immature and irresponsible I regret it every day because that poor snake probably died or was sold to another teenager that took even worse care of it. Now that I'm an adult I work in fostering animals partially to make up for what happened with that snake.

Seriously consider your actions and the consequences of what may happen to the animals you are taking care of if you break your family's house rules.