You stood at the door and watched your bully fuck your Mom. They gave a quick glance in your direction and continued what they were doing. Your presence doesn't bother them. Filling your mom with his cum is the priority.
Do you remember these panties? My hubbies boss came in them after he looked at those posts in my dad's swimming pool. He wants me to fuck him and call him daddy.
You thought your bully was the only one fucking your mother. Now it seems he brought his friends over to use her any way they want. You can do nothing about it.