Mikey and his sister Venus are in the nursery with all of their toys wearing nothing but t-shirts with thick diapers on. The two play games with their stuffed animals and with each other, sweetly kissing and cuddling. It starts out as innocent play, just rolling around on top of each other and touching each others diapers. But both are quickly getting excited. Mikey pulls Venus on top of him, she cant help bouncing and thrusting against his diaper. Soon the two are humping wildly with their diapers. Venus just cant help but to pull out his nice hard cock and start playing with it. She sucks on his cock, pleasing him like a good sister. The take turns giving each other spankings for being very bad, but this just excites them more. They are so turned on by playing naughty together that soon Mikeys hand ends up down his sisters diaper while she jacks him off. They masturbate each other hard and fast in their diapers as they writhe in pleasure. When the temptation becomes too much, Mikey orders his sister onto her hands and knees. He pulls her diaper aside to allow his cock to slip into her pussy. Mikey her doggy style good and hard with their diapers on. Venus feels so good with her brothers massive cock in her that she insists on getting on top of him and riding his dick.