Mommy comes into your room, you are sat with your brother, and mommy wants to catch up on what you have been learning today. You tell her you've been learning about the female body, and want mommy to show you hers. She is more than happy to, and starts to strip, starting with her tits. She exposes herself to both you and your brother, but only he gets to squeeze and suck them. Next is mommy's big peachy ass. The only boy who can touch is your brother. Finally it's mommy's shaven pretty pussy, but guess who's not allowed to finger her, or slide his cock inside her. That's right. You can only watch whilst mommy denies and cucks you for your brother, you can be sad, jealous and cry all you want. He makes mommy horny, not you.