Crap my mom! Help me!!!?

Ugh. I am so mad at my mother! I have 2 cats male and female and a year ago they became outdoor cats because they peed all over our house. I've lost my connection with them and sometimes my mom lets me bring my cat Esther inside if I watch her the whole time even though she's the one who pees all over. Well I asked her if I could bring my other cat Nick inside (he has never peed in the house) and she refused to just because he sheds! Is this being somehow...racist to him? Because he can't help that he sheds, its just his breed! How can I make her change her mind? This is so unfair!