We arrived at my brother in-laws house early in the afternoon. My Sister-in-law and I had always been close. She is in her late forties, a little on the pudgy side but with nice large tits, a pretty face and olive skin. Well it was decided that her and I would go to the grocery store to pick some extra food. As we drove we started to talk about various things. As we talked I made a crack about my sex life, she responded that hers had not been that great, it seems that she had not had sex in about eight months. I explained to her that my problem was not with the amount of sex but the quality. We had never talked about this before, but I could see that she was not uncomfortable with it.
We continued to talk and I started to get graphic about my lack of satisfaction. She said that she wished she had that problem. As we left the car to enter the store I could see that she was deep in thought. In the store I made it a point to brush against her body several times just to see if I could get a response, she said nothing. We loaded the groceries into the car, you know we could solve each others problem if we wanted to, I said. She looked over at me, I put my hand on her knee and ran it up to the end of her shorts, she looked down and said, lets take the long way home.
She directed me to drive to an isolated area, I stopped the car. What did you have in mind she asked. Well tomorrow everybody but you is going out to the theme park, I could get sick and not be able to go. Then what she asked , well maybe you and I could satisfy each other craving, I placed my hand on her knee again. She thought for a moment, this would be just a one time thing she said, yes I answered, If that's what you want. I slowly had put my arm over the seat back and now dropped my hand down to the top of her exposed breast (she was wearing a halter top) I gently ran my hand over the top of her tits. She looked down at my hand, that feels good she said. Well what about tomorrow, I asked.
She turned her head and kissed me, I moved my hand down inside her top and gently looked for her nipple, once found I slowly and lightly rubbed it. she said maybe we better save something for tomorrow. I guess that this means that you want me to be sick tomorrow, I said, well not to sick she said. OK I said as I removed my hand from her breast. The next day I was sick, I told my wife that she should go with her brother and the kids, I would stay home with my sister in-law.