So this continued for over a month. I realised that she was a very sexually charged women who enjoyed sex very much. I watched her have her bathe and ...asturbate every day, mostly she used to use her hands to finger her pussy, occasionally she used to put a finger in arsehole as she fingered herself to orgasm. On a couple of occasion she also used a small banana to rub herself. I also realised that though she was having an affair with my father she could not be very satisfied sexually as my. I could see tears in the corner of her eyes and I became worried that she would choke. All of a sudden, I felt something give and my cock slipped into her throat. Fuck! She held me very still and did not move. I didn’t know what was going on but it sure felt good. It felt like my cock was trapped in velvet covered vice. I watched her face and noticed that she was trying to control her breathing. Even though I could still see several inches of my cock, I knew that much of it was certainly down. "Hungry?", I asked Miley, "I can put a pizza into the oven. "That sounds good to me, you do that while I jump into the shower, I haven't bathed since I went for a run earlier." As she walked away, off the couch, I caught the top of her blue G-String winking at me from the top of her sexy cotton shorts. I felt myself get an instant hard-on. I quickly became embarrassed at my own impure thoughts. She was my sister, it would be inappropriate, and disgusting to think of her that way. But I. Gail drained the rest of her drink and carefully put the glass on the bar and she steadied herself as my finger tip rubbed near her clitoris. I finished my drink and removed my hand from between her legs which she quickly shut. "Come on lets go. Oh my god I feel such a lovely slut, I bet those guys will be going in that bar every night from now on." Gail said giggling like a naughty girl who had just been caught playing with herself. "I'm so horny know Lee, take me back to the hotel and fuck.