My Pjs were loose and my throbbing dick flopped around as I walked. I had permission and let go, and the ecstasy kicked in. I hear your bed frame hitting the wall every time you do it, dumb ass. I shook, and slowly pulled away from the kiss. My cock ached and throbbed sliding within her smooth wet pussy and it pulsed, and then pulsed again, and then a wave of hot white oozing cum shot out of me, and then another and another, and another, and my sister bounded up and down me faster and faster as I filled her warmth with mine. I had a blurry image of her sliding her pajama bottoms down, but I couldn't picture her naked. We told each other everything. I think we were both ready to forget this conversation ever happened, but I still had the butterflies in my stomach, a kind of excitement, and the thought of a girl listening to me getting off was turning me on, hard. I was speechless and she grinned. When she felt my orgasm finish, she slowed down and eventually pulled off. I got back to my room, shut the door, then opened it, went back into the hallway, and without even knocking, turned the knob and pushed open my sister's door. In one swoop, she slid her hand down my pants and underwear, and found my cock. I didn't have a frame of reference but I was sure she was a good kisser.