Sometimes we all don't end up with the best/most supportive parents. And yeah, sometimes they aren't the nicest people in the world. Regardless, they have raised you, cared for you and provided for you for your whole life.

Even though your mother seems to be a "tyrant", she deserves to say what comes and goes inside her own house. If she doesn't want you to have a snake, respect that choice and just wait for one short year to get as many snakes as you want.