The blouse fell forward allowing me a clear view of her firm breasts held in a small red bra. My cock was rigid and when she moved to sit down at my s...de of the counter the bulge in my trousers was impossible to hide.Sarah looked directly at where my erection was fighting to escape, smiled and said 'I told you I could look sexy.'Slowly realising that this was a carry on from the previous week I began to laugh 'You little vixen. You planned this all along'Her smile grew even wider 'I thought I. This was definitely why I first ended up crossdressing. I was sixteen and round one of my 'girlfriends' house for a few drinks on Halloween before we went to a house party nearby. I never much cared for Halloween, so just came as myself. When I came in they all sighed since I wasn't in a costume, but dropped it fairly quickly. We sat having a few glasses of wine and waiting for the last of our group, Laura, when the doorbell rang and she arrived. Karen, whose house it was, went to the door to. I was making dinner when my sister came in wearing a long t shirt that came up to the middle of her thighs. her hair was pulled into a pony tail and she was wearing her two anklets that i had given her. she came behind me and gave he a hug from behind, she nuzzled her head into my back." you smell good" she said"yeah i try" i joked"you're making me dinner.. how romantic" she said and i didn't really didn't think she was kidding, when you only have each other and you go to a high school that has. If you'll go down on me right now and clean me up, I'll be your sex slave for the rest of this trip."He hesitated. "Uhh.. baby, I'd love that, but we're not exactly alone, and.. well, you know I don't want to do that. It's really gross."She sighed, then said with more sensuality in her voice than I had ever heard, "Would you relax, baby? First of all, he's just laid there naked with us while we fucked! Second, how can you say it's gross when you always want to cum in my mouth, and I.