I don't exactly know why, but the sight of her doing this turned me on. Again, my cock went rock hard. It actually began to throb with excitement. I p...lled it out and began to stroke it. I let out a loud groan, and immediately froze.My sister looked up and saw me standing there with my cock in my hand. I thought she was going to yell at me, but she just went back to fucking herself. She started forcing the toy in and out of her pussy so hard I thought that it might have hurt her. I began. The arm binder did not cover her hands. Her hands were still clenched into fists around golf balls, and covered with electrical tape. Making them completely useless even if her arms were free. Her upper body was enclosed in a heavily boned leather corset. It was pulled tight as she had trouble taking a deep breath. It was undercut at her breasts to allow her nipples to stick out. Her nipples were still sore from the new piercings they had received. The stainless steel rings in each. As we snogged I was feeling her breasts and as I moved down to her neck she said “I haven’t had a man for ages but I do masturbate” I completely ignored what she said and started to unbutton her blouse, pushing it off her shoulders and unclipping her bra, her tits were soon in my hands and her nipples were really hard.We moved and sat on the bed as I licked each nipple in turn her arm over my shoulder her moaning getting louder. Moving my hand across her chub I bunched up her skirt as my hand. Marsha sat up straight and looked around. Tears were filling her eyes.“Yes, I can. It was horrible.”“Start at the beginning. Tell me everything that happened. Remember that it is over and you don’t have to worry about something like this happening to you again.”Marsha recounted the weekend. Jan asked her for more detail when she was tempted to gloss over specifics. Jake suppressed her fear, shame, and anger when they became strong enough to interfere with her narrative.Mrs. Schaff was shocked.