Today is my 18th birthday. That evening, when I came home from school, my mother was cooking in the kitchen. When I saw my mother's fat butt, I felt aroused. The little brother under my crotch immediately raised his head and raised his chest to push his crotch into a big bag. I quickly ran over, hugged my mother's body with one hand, and put his big dick on my mother's plump butt. My mother felt something under her body was pushing her butt. I immediately understood in my heart. When I touched her slender jade hand, I couldn't help but laughed and said in a lewd voice: Little thing, I'm not honest when I come back, and my butt hurts.