(MFF) finding out just how close wife and sister in law are Part [1]

Part [1]
(wife, mother-in-law and sister-in-law are all now ex.)
It was a couple days after Christmas when I found myself sitting on the couch of my mother-in-law’s couch in Arizona after my wife left for work as my sister-in-law stumbles down the stairs. She had just woken up after a late night, as we had a watched a movie the night before for her 18th birthday. As she was clearing the sleep out of her eyes I could not help but notice that she was only wearing a thin night shirt and loose booty shorts as she walked past the tv. I could feel my dick pressing up against my shorts as I watched her young round ass bounce with every step into the kitchen. As she got her breakfast and sat next to me on the couch we discussed the plan for the day. I had a pillow in my lap to hide my now painfully stiff dick as I now had the perfect view of her perfect body. Her shirt left nothing to the imagination and I could see her perky b cup breasts and her little pink slightly hard nipples. She shook me out of the trance that her body had me in to ask what our plan was for the day. After we decided to go to the mall and get lunch she raced upstairs to get in the shower. With my dick wanting to bust out of my shorts and precum covering the front I had to wait for her to get into her room before I could move.
She had gone into her mom’s bathroom to shower she would wouldn’t be lucky enough to catch her coming out of the shower but after our earlier interaction I needed to jerk off. After my very satisfying shower I walked into our room to see her bent over in just a towel borrowing some clothes from my ex-wife. She was in no hurry to stand up or leave and my dick began to grow at the thought of ripping off her towel and tasting her sweet teen pussy. I quickly had to sit down as my towel could no longer contain my ragging hardon. She bounced out of the room in away that she knew what she was doing to me as I gathered myself enough to get ready for the day. Our day was normal and uneventful other then her asking me how she looked in some new clothes that she wanted, nothing to reveling sadly. On our drive back to the house we were stuck in some afternoon traffic and I was driving a stick. While I was down shifting my hand “slipped” off the shifter and I grabbed her thigh. I meant for this to be quick, but she placed her hand over mine and a look that let me know that it was ok if we were to touch. After getting to the house we went upstairs to drop our bags and I was looking to touch a little more. While putting down our bag I grabbed her leg in a scaring/ joking manner and she jumped and grabbed my shoulder I then grabbed her hips and pulled her closer. After a lingering stare i dropped my hands and suggested that we go downstairs and watch a movie.
As we picked our movie she surprised me by slipping down the couch and laying her head in my lap. My dick was still stiff from the close encounter upstairs and her head in my lap would not allow it to recede anytime soon. There was no way that she couldn’t have noticed the tent that was pitched in my lap and the pool of precum that was slowly soaking its way through to the surface. As the movie progressed Her hand made its way under her head and was now grabbing thigh while inching closer and closer to my throbbing dick. I had placed my arm on the headrests of the couch to start the movie but slowly made my way to her hip and was not under her blanket and my finger tips were now tracing the bottom seam of her little jean shorts. There was no movement of disagreement, so my finger tips continued the pattern and they started to make their way further along the seam until I was to the point that I was sliding my fingers in the fold between her perfect teen ass and the inside of her thigh. At this point I could feel a slight humping motion pushing her ass back and my fingers deeper into her thigh gap, I was about to explode. Her hand had made its way up to my hip and I could feel her exploring the want to move it into my lap. As I was about to move my hand into the front of her jean shorts in hopes that it would prompt her wrap her hand around my pulsating dick we heard the garage door open and we were shaken from our lust. She sat up and finally looked down at my lap seeing what her hand had been so close to. Her eyes widened as I pulled her blanket over my lap and the door to the garage opened. It was my wife home from work. Time had gotten away from us and the movie had been long over as we explored each other.
My wife asked the typical questions about our day together as she went up stairs to shower and change out of her work clothes. Once we heard the shower running we knew what we would have a couple more minutes together. She slid closer to me as I placed my arm around her waist and slipped the tips of my fingers into her waist band. I paused as I could not feel any underwear, as I slowly looked up I could see a little smirk forming on her face. Her hand went under the blanket and without hesitation started to softly trace my still throbbing cock. I could feel her rub her finger tips together with the precum that had pooled on the surface of my shorts. It seemed like seconds, but it must have been minutes as we heard the bathroom door open and my wife ask if we wanted to go down to the pool for a little bit. We both looked at each other in pure lust and the idea of taking this further.

Source: reddit.com/r/sexystories/comments/c3ik7y/mff_finding_out_just_how_close_wife_and_sister_in