(MFF) finding out just how close wife and sister in law are Part [2] [long]

Part [2]

(Backstory- my wife and her sister were very open with each other, and with my mother-in-law being newly divorced and dating was never at home and rarely spent the night in her bed. This left the girls to roam the house in little to no clothes and talk to each other freely. I was working overseas at the time and was only home a couple of months out of the year and at this point was very glad that my schedule kept me away. I felt that my time away gave the girls plenty of time to get very comfortable with each other.)

As we made our way up the stairs, my wife turned the corner and stood at the top completely nude. I stopped dead in my tracks as my sister-in-law continued. I had heard of stuff like this happening around the house and about the conversations that they had had, but this was the first time that I was physically there for it. My sister-in-law was not phased and picked up a conversation with her at the top of the stairs while they turned to head into the bedroom to change. I picked my jaw up off the floor and reached the top of the stairs. As I turned the corner and stepped into the doorway of our bedroom, I could see my wife’s thick ass bent over, and her pussy is peaking through her thighs as she bent over to pull up her bikini bottoms. I now have a good excuse for my dick is so hard as my eyes darted to my sister-in-law just in time to watch her peal her jean shorts from her perfect ass and let them drop to the floor. Now I could see that the two were closer then I could ever wish for. It took everything that I had not to drop my shorts and slip into my wife while thinking about my sister-in-law’s young tight pussy.

I somehow held back, but I was unable to hide, the now massive tent that was formed in my shorts. My wife turned around and grabbed my hard dick with a smile and little giggle. She always liked making me hard in front of other people, if only she had known that I was hard because of her little sister and not her. Her sister gave the same little smile as she saw her sister reach down and grab my dick. My wife had started downstairs, and I thought that she would be far enough away for me to begin to change. My sister-in-law was still in the room and was struggling to tie her top. I offered to help her, and as I stepped forward, I dropped my shorts. With her back turned to me, I began to tie her top with my dick still hard and oozing precum gently pressed against her bikini bottoms. She jumped slightly in surprise as my dick was now pressing forcefully between her little cheeks. I could feel as she started to push back as she wanted my dick I advance further then her bottoms were allowing. Just then, my wife calls up to us to see if we were ready and for us to grab the towels. I quickly grabbed my trunks and waited for a minute after she had left the room, so I didn’t alert my wife to the fact the I was changing with her in there.

My wife and sister-in-law were waiting at the bottom of the stairs for me as I tied my trunks and walked downstairs. We started our walk to the pool, and I fell a little behind them as they talk about our day out together. I could see a fresh wet spot on her bottoms as she wiggled her butt a little more than usual. We get to the pool, and my wife just wanted to lay out, and tan, but my sister-in-law and I tried to get into the pool. As I got in slowly, she jumped in; I swam up close to her as she surfaced and tried to get out bodies as close as possible without my wife noticing. I wasn’t fast enough to catch her before she surfaced, but I did get a knowing look as she saw intentions. The afternoon was filled with play fighting and touching under the water. We were getting closer and more comfortable as time went on. Before leaving the water, I was able to slip my dick out of my trunks and let to rest up against her tight little ass as she sat on my lap in the corner of the pool while she chatted with my wife about dinner. There was no protesting, as I decided to take it further and gently pulled her bottoms to the side. As my dick began to slide between her thighs, my wife asked if we wanted to go to dinner. We both said that we wanted to stay in, and we should order something. My wife said that she would head back to the house to grab her phone, and we would order dinner. We both said that we wanted to stay and swim some more and that we would meet her back at the house for dinner. My wife was a little reluctant at first, but she was hungry and started to walk back to the house. With my dick harder than ever, still, between her thighs and the tip touching her lips, she began to pull back into my lap. I quickly made sure that no one else was around the pool or could see us from their windows.

Source: reddit.com/r/sexystories/comments/c7xj9s/mff_finding_out_just_how_close_wife_and_sister_in