One night we were all on vacation , and heavily drinking , it was late and everyone went to bed except for me and my friends sister. Mind you I’m 27 and she’s about 40. We’re sitting in the hot tub drinking and she’s getting close and then backing away , I can’t help but to look down every few seconds , finally she touches my inner thigh and by that point my cock is throbbing so hard . After a few minutes she asks to get out of the hot tub and I said I would get her a towel , I tried hiding my cock but it was impossible ;she looks directly at it and stands up to get out . I walk over to the steps by the hot tub and she’s standing in front of me one step below me, my cock is right at her chest and she grabs it , I bent down and we made out for a second until she pulls her tits out and I immediately pulled my cock out ; & shoved it in between her tits ,it was so hot and I was so horny . All of a sudden someone walks out on the porch above us and we quickly stopped , never spoke about it again and I wish I could be in tht position one more time , I still think about it , I wonder if she does to.