After a going away party for a friend of mine, my girlfriend at the time and I headed back to my parents house. I was 19, and she was 18.

PREFACE:

I’m a 6’4” white guy, with a blessed proportion cock. My gf then was a 5’4” smoking hot, half asian, half Spanish absolute knockout, with a perfect ass, dark hair, and skin.

We had a normal relationship, and of course were very sexually active, per usual of people our age. We’d never even talked about incorporating others into our sex life, though.

She had mentioned that she’d shown a few friends of hers pictures we’d taken while having sex. I didn’t think much of it, other than girls just being girls.

So we get back to my house, and into my room, and as horny teenagers do, we started having sex.

I remember being in the “lazy dog” position, and grabbing her tits. In the middle of our session, I hear a car pull up to the house, and hear my friends voice. “Hey, you guys left Shannon there. She needs a ride, or a place to stay”.

What this was, was my friend being a dick, knowing I was balls deep in my girlfriend already, and throwing a complete cockblock at me, by giving her friend from the party a ride to my place. He knew what he was doing.

So I grabbed some clothes, hid my boner, and walked to the front door to let her in.

I told her to just crash in my room, and she was totally fine doing so. I might also mention, we lived on a lake, so she was only wearing a bikini with a coverup over it.

She came into my room, and saw my girlfriend under the covers. “Shannon, you can just sleep here” my gf said, beckoning her to the opposite side of my spot.

Shannon puller her cover up off, and slid into bed next to my girlfriend. They both giggled, and Shannon asked “Why are you naked?!”

“We were having sex until you showed up. No worries, though. Just sleep here”

I got into the bed on the opposite side of my girlfriend, who was now in between Shannon and I.

Once I laid down, I figured our night was over, but my girlfriend started rubbing her ass against my cock, and reached down to grab it and start stroking.

I reciprocated by grabbing her tits, and felt Shannon back up close to my girlfriend. Close enough that she could feel what I was doing.

In no time at all, my girlfriend whispers “let’s have a threesome” and my hand instantly went from her naked breast, to her friends chest, still covered by a bikini. Her friend grabbed my hand, and slid it underneath her bikini, while at the same time saying “I think we already are”.