Luckily for me, my step sister has her hot brunette friend over for a studying session. I go in her room and glance at them. I tell them about my anatomy exam and ask them if they could help. If only they knew my true intentions with them.
I tell her that she needs to get naked, so she flips up her miniskirt to let me take her panties off.
Reaching out to slide my fingers up and down her beautiful pussy slit, I gradually insert two fingers into her tight twat. Her little pee hole is so tight, warm and moist. My stepsister, being the gullible teen that she is, agrees to help me too and I ask her to go to a different room for a minute. I stand her in front of me and ask her to take off all of her clothes.
After all, who would want to stand in the way of science and research? So, she listens to me and starts taking everything off.
I tell her to bend over on the bed and I start snooping around her tight teen pussy. My step sister has a wonderful ass, so lovely little asshole and a pretty pussy! Right there, I pull out my already hard cock and start stroking it against her entrance.
I turn my sister around and get her on her knees before unloading my hot cum all over her mouth and her cute face. The little whore takes it with a bright smile on her face. My slut of a sister sits on the bed and right then, her friend walks into the room and I know exactly where I want this to go. A threesome with my sister and her friend would be fucking amazing, so I manage to convince her to join us.
I lie down on the bed and two naked girls start sucking on my balls and giving me a nice blowjob. The girls are both sucking on my balls and licking my shaft and I get a nice edging session. This gets me really horny and I take that slutty friend of hers and bend her over on the bed. My sister sees her chance to get something out of the situation and she sits in front of her with her legs spread wide and her friend starts giving her head. Two young naked girls lie on their backs with their legs spread so that I can get a side by side comparison of their pussies.
The girls rearrange themselves into a double pussy stack so that I can alternate between two delightful twats.