The next three days went very well. Kathlyn said that she had strained her shoulder and would not be able to punish him for a couple weeks. Sherri was being very nice. He spent most of the days studying, he had placement exams next week. There would be four of them, and he wanted to do perfectly on each of them. Kathlyn specifically forbade him to jack off until her arms were better though, he was getting pretty horny but he was doing pretty good at keeping his mind off sex. He only got a few points to bring his total up to 275.

That all changed on day 4, it was Friday and for some reason, right after breakfast he got a super raging hard on. He tried to study, but his cock was pronging out like a flag pole. Sherri kept bumping into him and groping him. Kathlyn was in the library with him most of the day so he could find no time to stroke himself even a little. Immediately after lunch it got even worse. Kathlyn caught him rubbing himself twice so he got another 200 for each of those, 150 for masturbating and 50 for vulgar behaviour. So he was at 675. After dinner he was going crazy, he had to excuse himself to go shower early, he was hoping to jack off when no one was looking.

As soon as he was in the shower and stroking his cock though Sherri showed up. She crowded against him in the shower, mashing her firm breasts into his chest. She grabbed the soap and immediately began soaping and massaging his aching cock and balls. She handed him the soap and asked him to wash her breasts as she continued to fondle and wash his genital organs. He readily complied, rubbing the soap all over her breasts and tweaking her nipples sharply with his fingers. This continued for a few minutes until she turned around and asked him to wash her ass. He rubbed the bar of soap between her as cheeks and began rubbing his hands over her rounded hips. He probed at her anus with his finger and she immediately sighed and backed into his finger. Hanging her head she let him begin to ream her ass hole with his fingers.

He slid his soapy index finger up into her rectum and her body seemed to vibrate around his finger. He pushed in a second finger as she twisted and humped his digits. When he jammed in three fingers she was breathing heavily and squirming on his hand. She slowly pulled his hand out and backed into him pinning his soapy cock between her ass cheeks. Placing his hands on her tits. She began sliding his body up and down against his. Sliding his slippery prick between her ass cheeks. Sherri was still getting used to the idea of having that monster up her rectum.

She couldn't believe the size of his cock. Twelve inches long with fat knobby head and curved shaft. It had shrunk slightly in girth since the operation though it was still about 2 and half inches thick. She grabbed the heavy ridged shaft and levered it down towards her anus and bending forward slightly. She relaxed her sphincter as much as possible and pressed her body back towards him. David grabbed her hips and rotated them slightly forcing the head of his cock past the opening to her ass hole.

Sherri sighed and spread her legs further apart. She reached between them to find David's engorged prick. She began working it deeper into her ass.When about 4 inches were inside her hot ass David started pumping her. Reaming her ass a little deeper each stroke. Soon he was plunging eight inches into her. Sherri loved the feel of pressure on her guts. She noticed that he was thicker towards the base of his cock and each deeper plunge reamed her ass just a tiny bit wider. She grabbed his balls and pulled them forward. David grunted cramming even more meat into her abused asshole.

He started slamming into her ass, pulling out 8 or 9 inches then powering back in. After just a couple more minutes of ass reaming Sherri felt his balls tighten and moaned. "Here it comes."

Kathlyn pulled back the shower curtain as David continued to load his massive cock into Sherri's back door. Kathlyn ordered him to stop and he even tried to, but Sherri would not release his balls. It was too much for David and he unloaded his cream into her ass tunnel. He relaxed as sperm began seeping out of Sherri's steaming ass. Kalthlyn said, "Well David, you are in deep trouble again. 675 plus 1050, that makes 1725. Sherri will punish you for 200 tomorrow. Now finish your shower and go to bed."