After work I now have to go to my personal trainer Sandra for additionalexercise. I have to undress and wear a new aerobic outfit ? this one isquite f...minine and pink. It also has some interesting feature ? a builtin slot have been made in the crotch area under my scrotum and smallopening for my nipples. First thing she does is to bring me to a threadmill machine where she attaches a chain to my scrotum ring and put thetimer to 45 minutes at a fast walking pace. I sweat quite a bit beforeshe. Now the sisters' heads were also locked facing straight ahead but,for effect, a set of 3" square stiff black leather blinders attached to theharness beside their eyes. Pulling them away from the wall Karen fixed Amy's hair in a short leathersleeve so that it stood straight up before flowing down the back of her headin a plume. I did the same to Susan and then attached a lead rein to each endof the bit bar and pulled them to the center of the floor. The butt plugs were attached to the short arm. I asked if they had gotten off yet and they both said they had not. The one other girl had sex with a couple of guys and then left. This just left a few other guys and nothing had really happened. She looked at me and smiled. Earlier she said she was hoping to see some guy on guy action. I told the guys that I would love to suck them off. I told them that I loved sucking cock and always swallow. They both came over to me with big smiles.I was sitting on the bed, so my face was at cock height. I. “Don’t back away when I’m hitting you, bitch!” She said, “I’m sorry, sir” and repositioned herself for more punishment.I went back at it, taking healthy swings. Her B-cups were firm and didn’t jiggle that much with each slap. Ah, the joys of youth.After a few minutes of this my hands were starting to sting – her breasts must have been really hurting. But she didn’t complain. She did moan a lot, though. And her nipples were now very hard.“Put your head over the side of the bed,” I ordered, “I.