I love to watch my sister getting spanked. She's seven years older and when mom spanks her over her knee on her shorts her fanny clenches and those tight shorts pull in her crack and I get really excited. Then mom pulls her panties down and she gets spanked eventually on her bare fanny and I watch from the crack in the doorway and masturbate with my hands down the front of my jeans as I watch and listen to her cry out and moan. After she's been spanked and goes to sleep I steal her shorts and the panties she wore and lay on my bed and masturbate as I sniff the seam and crotch of her green faded shorts. I put her panties over my face and sniff with my eyes closed thinking about spanking her bare arse over my knee and sniffing her wet crotch. Sometimes I lay over the seat of a chair in my room and listen as she gets spanked and rub myself on the edge of the chair to the tempo of the paddle hitting the seat of my sister's shorts.