I was thinking of lying, making up something along early 50's as she is 47 old, but i decidedto go with the real age…."I'm 24"I can clearly see ther...e was a noticeable silence. till now , her reply texts had been pretty quick,I wondered if I'd given the wronganswer. Then…."24. I have a son that age!, how can you possibly think I'm sexy?"thats it , she is not angry towards me, still enjoy chatting with someone in her sons age. so i never bothered about the concequences, straight away i. "Yes" I asked, her fingers brushing timidly down my lower back to the curve of my tight ass and I felt a deep craving for her. "Not now, later" I removed her fingers, and slipped past, knowing that she was watching my hips sway in desire. He sat in the chair, head leaning back and his short dark hair gleaming in the single light. Sweat dripped down his naked, hard muscled chest. His eyes were closed, but I knew they matched his dark personality. His wrists were confined tightly to the chair,. My hands slip underneath her tank top and I feel her soft belly as she grabs and starts rubbing my crotch. We stop briefly as we get to her room. Before the door even closes I throw her onto the bed. I start kissing down her neck, bury my face in her cleavage and take a deep breath of her sweet perfume. She smells of flowers. My hands explore her between her legs. Her shorts are warm and damp. She lets out a soft moan as I massage her crotch. She quickly takes off her tank top and she’s wearing. Your sister is still lying blank on the floor, in shock with no real idea whats going on. I start to untie you but push you down leaving you lying on the bed, you do what your told, scared that this will all end if you dont. Taking the rope and walking over to your sister, gently leading her over to the radiator, facing the bed. i tie one of her hands to the radiator and tie the other rope between her arm and thigh so her hand is resting just above her pussy, giving her space to play with.