I fucked my SIL while my wife slept in the other room

My wife and I (both 25 currently) were visiting her younger sister in college for the weekend. Rather than staying at a hotel, we decided to stay with the sister at her college house and my wife would sleep in the bed with her and I would sleep on the floor. My wife was 5’7 with amazing 32dd boobs and a great ass. Now the SIL was similar to wife but shorter and more fit. 5’4 with 32dd boobs and an even better ass with perfect hips.

Now about the weekend, we got there on friday and all went out to drink that night. Safe to say we all had our fair share to drink and were all pretty drunk. I had noticed my SIL was being extra flirty with me but i dismissed it to just being the alcohol plus her outgoing personality. Around midnight, we decided to head back to the house. When we got there we all chilled on the couch for a nightcap. My wife passed out and fell asleep. I decided to go shower and fall asleep as well. I headed to my SIL’s bathroom and stripped down for a shower. Mid shower i thought i heard someone come in the bathroom. I was rinsing my hair so i couldnt look right away but when i opened my eyes, i saw the shower curtain slightly open with my SIL standing there fully nude staring at me. I was shocked thinking no way this was happening. I asked “what the hell. What are yiu doing in here” and she just responded “i want to shower too, and i figured i could since its my room”. I responded saying she should have just said she wanted to go first and I wouldve waited. She looked at me biting her lip and said “well i wanted you in here too”. Maybe i was too drunk to think straight but i immediately pulled her in and started kissing her. She giggled and reached down and started stroking my dick. I grabbed her ass tightly and she moaned. We were making out moving our hands all over each other when she reached around me, turned off the water and led me to her attached bedroom my holding my dick in her hand. My wife had never done that before so i almost came right then and there hahaha. Again, too drunk to think straight so i just went with it, not even thinking of the possibility of my wife waking up. I pushed my SIL on the bed and put her on all 4’s and started eating her out from behind. She didnt take long to cum. I knelt up and slipped my dick in her and started fucking her from behind. She was tighter than my wife and her pussy was gripping like crazy. Took me a few pumps before i was able to go all the way in. She was burying her head in the pillow so as to not make too much noise. I could not help myself. I grabbed my hips and went hard. The sound of her ass clapping was potentially loud enough to reach the living room. At this point my SIL started to tense up and started convulsing as she came again. She slipped off my dick and pushed me down and got on top. She turned around so she was in reverse cowgirl and lined up my cock and sat down on it. I thought my wife was great at reverse but my goodness my SIL felt out of this world. It was only about a minute before i felt myself start to get close. I let her know and that only made her go faster. I grabbed her hips and thrusted up causing her to moan pretty loudly that probably could be heard from the living room where my wife was asleep. I held her ass down while I emptied my load in her tight creamy pussy. She hopped off and headed to clean up in the bathroom. I followed and hopped back in the shower. She quickly joined me where we made out some more. I got dressed and went out to the living room to find my wife still fast asleep.