[Reading this story will likely be more enjoyable if you have read the preceding chapters. There's some dealing with bodily functions so if that bothers you, stop here.]
*
Susie and Jim continued to enjoy sex in their marriage after they had decided to submit to Susie's older sister Christine's dominance. One night in bed they discussed what they had done and how Christine's new role in their lives was affecting them.
"Jim," Susie began, "I hope you get as much of a charge out of this as I do. I suppose that I do get turned on by an assertive woman close to me, like my sister, taking charge and even disciplining me. It would probably sound crazy telling anyone, which I won't anyway, but it's really the way I feel."
Then she grinned and added, "Or maybe it's the way my pussy feels because it gets so wet even when I think about this."
Jim grinned and then replied, "You know, Suze, I wasn't sure this was a great idea. I guess that there's something in me too that gets excited by this kind of thing."
He stared lovingly at his cute brunette-haired wife, with her lithe frame and petite figure, with a 34A bust but a nice small body that went well with her assets: "I love you so and perhaps this is something we share that brought us together in the first place."
Susan smiled back and clutched Jim tightly in bed as she felt warmth in her mid-section and realized that she was getting very wet down there and as she was in her nightie with no panties, she was going to get the sheets wet. She whispered to Jim that he was making her very randy and that her pussy was flowing.
Jim kissed her for a long time and reached down under her nightgown to fondle her cunt. Then he gently rolled her over and holding himself on his arms, slid his now-erect penis right into her well-lubricated passage. They enjoyed their congress for some time, as they always found that "good old-fashioned fucking" made them both happy.
The next morning they appeared for breakfast with a glow, not lessened by Susie's realizing that her not laying a towel beneath her buttocks meant she slept in the proverbial wet spot all night. Christine had been there already and made coffee, and was about to leave for school.
"You two look quite pleased with yourselves," she said with a smile.
Susie blushed and decided to be forthcoming. "I suppose I need to be honest, Chris," she began slowly, "and tell you we had some wonderful sex last night."
Christine took this in, knowing that her sister was overcoming many barriers in being so forthright.
"I do appreciate your telling me that, Susie," she replied, "and I did want to speak to Jim and you on that subject." Susie started wondering if she had acted wisely in telling all.
"We are about to venture into more kinky territory in terms of my control," Christine stated, "so if you two want to continue, this is your chance to change the status...or even end it."
Susan looked at Jim and he answered deliberately, "No, Miss Christine. We both have recognized that we both need and enjoy what you have given us."
Chris grinned and thanked both of them for their confidence in her. She also told them that they only need to call her Miss Christine when they were being disciplined or otherwise under direct control.
"That having been said," she went on, "I do intend that from now on, sexual intercourse will be a privilege and you will request and receive my permission before engaging. Is that understood?"
Susie and Jim were slightly surprised but answered yes. Chris continued, "So when you find yourselves in the mood, you will first come to me and ask for permission. Understood? Good. We are going to begin your anal training today."
With that, she opened her handbag and removed two rather slim anal buttplugs. Both Susie and Jim were somewhat taken aback but then Chris motioned to them to lower their slacks and underwear and bend over.
In that embarrassing position, with panties and undershorts down and their anuses exposed as well as Susie's pudenda peeking through her open legs and Jim's scrotum visible, Chris took the plugs, rubbed a bit of lube on the business end and slowly inserted them in each anal opening.
"You will feel good, I hope," Chris said, "because these are relatively small. But now you may pull up panties and shorts. If you need to take them out for natural needs, do so but I trust you to put them back in."
***
Susan was working this week at a local merchandising office, developing an ad campaign with them. There were many meetings each day so when she arrived she first went to the ladies room to empty her bladder in preparation for a long busy work day.
She went into a stall and rucked up her skirt and pulled down her panties. She was surprised at how badly she needed to pee, even though it was cold outside and she had had a lot of coffee for breakfast. Maybe it was the plug pressing on her bladder, too, she thought.
But then she felt another seeming result of the coffee—and maybe the plug, too—when it came through to her that she needed to have a bowel movement...and it was becoming very insistent. Susie was very, very glad she was already on the toilet. She reached behind her and feeling quite embarrassed even though no one could see her, she managed to get hold of the plug, although it had pushed into her rectum, and gradually extract it.
She had barely moved her hand out of the way when she felt a huge, long doody (Susie couldn't get away from that word, which her mother had used when she was a little girl) surge out of her usually tight hole. It was obvious that Chris's plug had made her asshole looser and she began to worry that she might lose control: she might shit her panties in a meeting.
The thought sobered her and also got her pussy wetter as the embarrassing possibility began to take over her consciousness. Somehow she pulled herself together and wiped, rather unwillingly re-inserted the buttplug, pulled up her panties, washed her hands, and got back to work.
She had a major conference just before lunch. And worst of all, she started feeling that sinking feeling that she needed, yes, to shit again, to make a doody. The meeting was reaching its key point: when the management group would act on her proposal for the campaign. She gritted her teeth and tried to retain her composure.