Parent doesn't want client working with males out of concern

My smaller brother is in ABA, he's 4 and doesn't yet hold a conversation. My mom has noticed that's a lot of male therapists have been rotated in and out of his team. She has concern about possibility of sexual abuse. If she talked to the BCBA would they be accommodating to her discomforts?

edit: I do not agree with my mom on this, I was an RBT for a short period of time myself and have worked with a few males that i thought were great with their clients. I believe it is just the way she views the world, she was the same with me as a girl. I just cannot change her mind or viewpoint on the world