As time passed, the dynamics of the two sisters changed. April was now the dominant sister in their private life and May felt she'd found her true place. May had for a long time hid her submissive feelings, but once she'd confessed those feelings to April, she'd now become a happy young woman.
They played their games in the privacy of home. It was their big secret. Cashing in on the benefits of having a submissive sister, April made sure that May gave her at least two orgasms each day, using fingers and cunnilingus. Sometimes April insisted that they do this outside in their somewhat secluded back yard. May got very aroused at the humiliation of doing this where they might be seen. Her pussy lips puffed up and drooled pussy juices, but she wasn't allowed to touch herself when pleasuring April.
Completely ignoring the fact that what they were doing was incest, April enjoyed playing with her sister's tits and pussy. Sometimes she'd make May simmer for hours, teetering on the edge of an orgasmic release, but then easing off just enough to preclude it, to May's immense frustration. Surprisingly, that frustration just served to intensify May's arousal so that when she finally was given an orgasm, it might be so intense that she fainted.
April watched lots of bondage videos which explained how to safely tie up a submissive, while practicing on May. Once she felt she understood the basics, there came an evening during which she commanded May to strip naked and lay herself face up on her bed. April carefully tied her sister into a very exposed and vulnerable spread-eagle position. April climbed between her sister's thighs and stared at her pussy. As she expected, soon that pussy began to leak May's aromatic lubricating juices, which April lapped at and enjoyed, while May wriggled in the rope restraints.
Curious by nature, April cautiously inserted two fingers into May's vaginal tunnel, stroking and feeling its hot, wet inner walls. As her sister got very aroused and her pussy opened up, April added a third finger stacked atop the other two, and enjoyed her sister's excited vocal reaction. However, when she added a fourth finger, her little finger and index finger crossed the other two fingers, creating a shape similar to a wedge. April's thumb instinctively entered the base of the wedge, and soon April was fucking her sister with all five digits, her knuckles bumping hard against May's vaginal ring.
The slimy pussy juices were smearing all over April's hand, including her knuckles. Moaning loudly with need, May was pleading, "I need to cum, Miss. I'm so close! I've never felt this full -- this stretched before! Please make me cum!"
"All right, you slutty whore," April answered. "Let's see if you can take all of this! If it's too much, tell me immediately!" As she finger fucked her tied submissive, she started rotating her wrist, pressing a little harder. To her surprise, at a certain angle her knuckles slipped inside May's vaginal opening, and her whole small hand was now inside her sister's vaginal tunnel for the very first time! She started fist-fucking that pussy, fascinated to see her wrist appearing and disappearing, and feeling May's tunnel muscles clamping down on the plunging fist. She even saw a small bulge created by her fist moving up and down May's tummy! In seconds, May screamed long and hard as she experienced a breathtaking orgasm!
Wanting her sister to have the full experience, April kept fisting that receptive pussy until she felt May's muscles go limp. The bed was definitely soaked with various fluids: sweat from May's straining body as she subconsciously pulled at the ropes, and cum and pussy juices expelled all over April's fist and wrist. April was actually rather shocked at how her sister had reacted to this experiment, but she was very pleased, and decided to add fisting to their play times. Maybe she'd even command May to try doing it to her, to see if she'd experience such an intense orgasm -- but not while being tied up, of course.
Since she enjoyed seeing her sister tied in spread-eagle position, April pounded four wooden stakes into the grassy lawn of their back yard and tied her sister to them. May was a little worried at being discovered like this, especially if April went over to sit on a chair on the porch, reading a book. But she never complained, because sometimes April would be wearing a short skirt with no panties, and hiking up her skirt enough to give May a lewd show. And that might lead to April straddling May's head so the submissive could use her lips and tongue to make April cum all over her face. And there was also the heavenly possibility that April might face May's feet while straddling, and go down on her twin in a sixty-nine position. They both enjoyed those outdoor orgasms immensely.
As the days continued, and May sank blissfully into a deeper state of submission, April started to give May rules that must be followed all the time, even in public. For instance, May must have a clean shaven pussy at all times and not wear panties. This was especially fun on windy days, since May was not allowed to shove the hem of her skirt down, but just endure the embarrassment of such 'accidental' exposures to nearby people.
When May was having her period, she had to let April watch as she inserted her tampon. Seeing its string hanging down gave April a naughty notion. She found a small bell that could be tied to the end of the tampon string. When May walked around like that, the jingling of the bell was clearly audible, even if May was wearing a skirt. So, after that discovery, April might insist that May insert a tampon with a bell even when she was not having a period. Then the sisters would go shopping for groceries or clothes and be very aware of the curious looks on people's faces as they wondered where the jingling sounds were coming from. April was very amused by this, enjoying the blushing of her sister's face and her look of embarrassment. But on the drive home, she allowed May to hike up her dress, and bring herself to orgasm by touching her pussy and clit. The tampon absorbed at least most of her cum.
In the fall of that year the twins tragically lost their parents in a skiing accident. The lost was felt deeply by the two girls and their many friends, who offered support during this time of devastating loss. When the will was eventually read, the twins learned that their parents had left everything to them, since they were now mature young adults. The girls decided to move back to the familiar surroundings of their family home. Coming home was bitter sweet, since they'd visited their parents often but now it was different. They settled into their old rooms and got down to the business of cleaning out the house. They found it very challenging to sort through items and decide what to keep and what to discard as donations.
Also during this time, they had several meetings with the lawyer to go thru paperwork and formally change many documents. They learned that everything was in order and that their Dad had arranged to have the lawyer itemize the estate to make their inheritance clear. The girls were amazed to learn their financial needs would be met for many years to come. They had no idea their parents had possessed that amount of money and investments. They were wealthy enough to no longer need to work, but they continued to do so, since it gave their lives structure.
After some time May came to April and asked humbly, "Miss, can we play again, please? I miss it."
April smiled and said, "I've been hoping we'd start again, girl. We were in mourning for a long time, so it's probably a good idea to play again. We'll start gradually, though." That night they slept together and enjoyed each other sexually for the first time in what seemed to be quite a while. After that, May spent most of the time in the house naked and wearing chains between her wrists and between her ankles. She also kept the house clean as if she were a maid. They did have groundskeepers and pool cleaners, etc. for the outside work. Those outside workers were on strict schedules, so the twins knew when they had privacy on their estate for periods of outdoor activities.
During days of good weather, April liked to put a collar and leash on her naked sister. She'd then handcuff her wrists behind her back, making her shoulders retract and her tits poke forward, nipples nicely erect. The dominant sister would then take her submissive for a nice walk around the grounds. Of course, one day she did this when the gardeners were expected. When they heard the door of their truck slam out in the driveway, April whispered to a naked May, "Oh my gosh! The gardeners! We only have a minute or two as they unload their equipment! Run to the house, slut!" She giggled as she enjoyed watching her bound sister scampering to reach the open french doors and vanish inside. May told her later what exciting fun it'd been to be almost caught.
