Sis Best Friend

So my sister had a close friend I met a few times which couple weeks ago a person let it slip she had a crush on me. She heard I had a nice member between my legs. Everyone was drinking and she went to the garage to have a smoke. I followed to keep her company in the dark, which led to laughs and playing darts. I made a joke that if I won she had to give me a bj. She didn’t even laugh just said “win win I get to try a bigger one than my ex.” I heard she had a few guys in the past but maybe she was a bit freaky actually. We played and she almost won but couldn’t pull off a win. There was an old couch to drink and hang out in the summer and sat down there. I was already semi hard and bulging through my pants. She pulled it out and I had my sisters best friend suck me. It was hard to last and she couldn’t fit more than half of me in her mouth before she started gagging. She is no stranger to the cumming in mouth cause she didn’t spit out or gag when I cummed in her mouth. I’m glad I went with her and can play darts what a good night even with no sex