Her limbs were strapped down to the bench which kept her in a doggy position - on all fours, legs spread, her cunt on display. Extra straps around her...torso, upper arms, thighs and neck were buckled tightly, fixing her so immovably in place that she could barely move a muscle. She felt the pressure of him slowly pushing a plug into her ass and inflating it to form a complete seal, and the final humiliation of him slowly pushing a catheter tube into her urethra. Then nothing - without another. She just had too much on her desk. But she hadn't had sex with Jake since Friday night so they would almost certainly have sex that night and she couldn't pass up a chance to give him his 'seconds.'It was enjoyable as always - and when she was getting dressed Dan asked:"Have you given any thought to what you are going to do when you get caught?" I don't intend to get caught." But you will. It is inevitable. No one ever thinks they will get caught when they cheat and I will grant you that some. Could a person be a dominant and a submissive at the same time? Turn one off and the other on at will? That would require some thought.Later, I caught one other girl looking around, rather than properly keeping her eyes on the floor in front of her. I left her wearing a pair of red stripes across her back. For the next few days I monitored my charges as they knelt interminably in their room, wondering just what they had gotten into.The library was only just down the hall, so I spent the days. I told Marc and he acknowledged him as well. The music got going again and he walked to our table and asked Marc if I could dance with him if I wanted.I said Ok and Marc said no problem. I got up and we danced and he Dave started telling me I looked really hot. I was wearing a skirt with black hose and sheer blouse that night. Thanks i said. A slow dance came on and we stayed on the floor, He held me tight and was surprised by the feel of his cock and i started to get hot already. He moved his.