L was my girlfriend at the time she was 5' 5" or 5' 7" 115-135 long red hair , pale skin with freckles everywhere, with blue eyes.

Little bit of back story here I've known these sister's since I was 6. We grew up in the same street and we saw each other every day. I've always figured the younger sister F had a crush on me since we were little. She always seemed to battle with her sister L for my attention or try to one up her whenever I was around. They only have like 2 or 3 years difference between them. It's always been like that. Now onto the story.

It was summertime I got a text from L saying "cum thru I'm at my cousin's house for the night and I want you right now." Her cousin's house was on the same street just at the opposite end from my house. I walked down shot a text saying I was 3 houses down and to unlock the gate and window for me.
Got to the house went through the gate and went to the window (bottom was hip height) so I put one leg in ducked under the window and stepped through. As soon as I got through the window F asked "What are YOU doing here?" I said "L said she was horny, so as her boyfriend to help relieve her of that. Why? Are you horny as well? I've brought extra condoms." I pulled out my 5 different scondoms and showed F. She said "no I'm good" with a chuckle as she pulled out her phone.

I turned to L and asked if she was ready she smiled and pulled the blanket off her naked body saying "just waiting for you" I walked over to her bed got undressed except my socks and asked L for some head before I put condoms on. After about 2-3 minutes of her sucking me she chose a condom from my hand put it on me and got into her favorite position of hooking her arms behind her knees and holding her legs back. Before we got started I looked at F to see what she was doing and she was trying to look like she was doing something on her phone. I got on the bed and in position on my knees.started round one of 2 L was making a bit of noise every other thrust along with sex sounds. F made a comment saying "you better not use all 5 of those condoms cuz I don't wanna hear this for the next hour and a half. " I chuckled at her and looked over at her and her back was against the wall and kept saying she's covering her head with her blanket. But still facing towards us.

During our 2 rounds she kept changing the way she sat, laid down or covered herself with a blanket and acting weird. Once we finished round 2 she popped out of the blanket and said "yaaay! Finally!" I just looked at her with a confused face as she rolled over in bed. So I disposed of my trash got dressed and went home.