I don’t know any women that would be inclined to be intimate with me.”Then I sure got surprised. Pris looked me in the eye and said, “Well there...is one right in front of you. Are you interested?”I sort of stammered out a reply something like, “Who wouldn’t be? Are you serious? What brought this on?”Pris explained. “Regular sex is important for good health, but when I have it with my boyfriends I make them wear condoms because we are not exclusive. Semen has many substances that the vagina. I was surprised my little sister wore sexy underwear. They weren't see through or anything, but they certainly weren't the cotton briefs I would have expected.I pictured her wearing them and I felt my dick react. I brought them to my nose and smelled the crotch. I knew my sister was a cute girl, but a switch had just been flipped. I closed the bathroom door and closed my eyes as I slid my pants down a little and grabbed my dick. I stroked myself while sniffing Ava's panties. After only a minute. I'll get dinner started as soon as I change." Then she went upstairs.I knew then something wasn't right. Why would she lie about being at work? What is she hiding? It was then I decided that I needed to find out her real schedule. Then I'd wait until she tells me she is working on a day she is NOT supposed to be there. But how do I get her schedule without her knowing about it?My son came in the house and broke my train of thought. "Hey pops." He then ran upstairs to shower and change for. And there’ll be boys too!”She whispered the last sentence as if passing on a state secret.“But we won’t know them,” I protested.“That’s even better, isn’t it? You can do what you want, and no-one back here will know,” Vanessa continued.“I’m not sure…”“Come on Caz. We deserve a treat after all those exams. We’ll be at Uni next year. Relax, it’ll be fun. Booze, boys, and a bit of weed. What’s not to like?”I thought about it. Put that way, the idea sounded a lot better, but I was still only a.