my son my rules?

well you see I'm 33 weeks today and I'm low key tired especially of my husbands older sister she always has something to say about me 😤i hate her and shes trying to convince his mother that since I'm 18 I'm not going to know what I'm doing and I should stay in their crowded house until the baby is 18 ....I swear she will never be allowed to hold my son I don't care how much she trys to convince my husband its a no😐also she calls me stupid dirty but I clean more then her I still go to school I take showers everyday and I'm sorry to say it to them I'm going to stay with my son in my house I have my own room there and its just better for us❤ofcourse he's going to visit sometimes but the way they want me to stay that's a big no no....am I wrong for doing this?