About an hour ago I woke up, my room is in the basement. I started
to come upstairs, and when I was walking up I heard a guy moaning.
I walked up ever so slowly and when I got to the top of the stairs,
I saw something which shocked the hell out of me. My sister's b/f
was sitting on the floor in the living room with his back against
the couch, and my sister was blowing him. One of the first things
I noticed was that there was a sealed condom on the couch right behind
him, and there was no condom on him. The sight of her with his dick
in her mouth turned me on big time. I crept up the stairs and snuck
behind the other couch which borders the dining room, so they wouldn't
see me, but I could peer around the couch and watch. She was holding
his penis at the base while sliding her mouth up and down on him pretty
slowly, she then took it out of her mouth and then just licked it
with her tongue first the head and then the shaft. After blowing him
for like five minutes, she stood up in front of him, she was already
topless but was still wearing panties, she was wearing a pink
very hot thong. She stood in front of him and told him to take off
her panties. He slowly slid them down and took them off. She then
took the condom off the couch and told him to lay down. He was now
laying on his back with his back facing the couch I was behind. She
took the condom out of the wrapper and grabbed his cock and rolled
it down his shaft. She then straddled him facing my direction so I
got a perfect full frontal view of her totally naked No pubic har, just a very beautiful pussy. I was so turned
on by seeing all of this I was hard and slowly stroking while I watched...anyway
as she straddled him she held his penis and guided it inside her vagina,
I couldn't believe I saw this, my sis being penetrated. She immediately
let out a moan kinda like a high pitch oooohh! She then started to
rock and thrust her pelvis while moaning oohs and ahhss. As she thrusted
on him her breasts would jiggle slightly, then he started to squeeze
and fondle them, but my focus was totally on the penetration, watching
her pussy slide up and down on his penis, then all of a sudden she
stopped thrusting and said pretty loud "I'm gonna cum! ohh"
Her thrusting became more of like a pelvic twitch as she moaning really
intensely Then she slid off him, thats when I snuck back downstairs,
and came on the computer. Its all still fresh in my mind