My mom uses my belly as an excuse on why I can't drive long distances but always expects me to drive…

My mom uses my belly as an excuse on why I can't drive long distances but always expects me to drive my grown ass brother everywhere (mind you, I had to wait inside my car for 4.5 hours for him) when he has his own car and treats her like absolute crap. Like why go out of your way for someone who wouldn't even lift a finger for you?