I liked all their attention. Well they got to know my little secret by the time I was fifteen. I was dressing every day in my sister's clothes after s...chool, and wearing a bra on the weekends, hoping for tits. When my mother found me wearing my sister's bra and undies, she approved of it. So I didn't feel out of place walking around the house nude except for underwear.At seventeen, Mom took me to the Doctor to get a check up. He noticed that my medical records read "F" not "M" so he Doctor. I take my dripping dick out after a moment and walk over to the other side of the desk. I pull Eliza's head down and begin throatfucking her as she rubs her pussy, mixing our juices together.Her whimpers and screams of pleasure are more muted with the quivering mass of cock being pushed into her esophagus each and every second. I fondle those perfect breasts as I thrust in and out of her skull, and try to hold back the tidal wave of cum that I can feel approaching. Eventually, I can take no. She left the place. I came out of bathroom and restless thinking of what happened. I was reluctant to look at my sister.She came out of kitchen and was normal as if nothing has happened. She served the breakfast. Her normal behavior made me feel comfortable. After tiffin, I went to watch TV. Sister also came and sat by the side of me.Since she was not enjoying sex for sometime, the scene she saw in the bath room had disturbed her. I guessed this from her face. She was sitting calm and watching. My hands whip out to try to claw down the metal surface of the car trunk. Your hands trap mine against the cool metal, so my long nails wouldn't damage this person's car."Do you like this big cock in your pussy?" you growl into my ear. "Oh God, yes!" I moan loudly as I arch my back and push my hips back in time to meet with your thrusts. I can feel another orgasm rising, and I gasp as I try to reach for it. Your hand comes down to spank my ass as you lean back a little. "Yeah, take that big.