Satori and I have been friends since childhood, and I often go to his house to play. We both went to the same school, were constantly involved and until three months ago, we decided to date. On the occasion of Satori's parents' absence, I was invited to her house to play. Because I was often at school, I hadn't been to her house for a while. Satori has an older sister, Konan, who I used to play with, and the two sisters even took a bath together. Ms. Konan is dressed extremely "cool", because she is not wearing a bra, her nipples are clearly visible through the thin shirt, and the rosy areola is constantly hidden in front of my eyes! She also found out that I was peeking at her breasts. When Satori went to wash the dishes, Konan took my hand and put it on her huge breasts! That night, when I went to the bathroom, I was called by my sister to go into her room to play. She asked about me and Satori, asked if we had fucked each other. When she found out that the two hadn't fucked each other, she immediately persuaded me to continue doing what I had just done. She took the initiative to kiss me, squeeze my breasts, undress me, suck my cock for me, and let me fuck her!! And from then on, Konan immediately seduced me every time I had the chance. I also couldn't have sex with my girlfriend anymore because I was constantly thinking about her. One time I came to play when my girlfriend hadn't returned. I was able to enter Konan's room, to have sex with her. I suddenly saw a small ring placed on the table. And from then on, I remembered my childhood, and knew why she wanted to have sex with me so much. This ring was given to me by Ms. Konan, although she no longer fits it, but she has always preserved and cherished it as well as always kept her promise to be my wife. But I forgot, went on a date with her own sister. I don't know what to do, but one thing is certain, I will not leave her, I want to be there to take care of her, love her, make up for her!!