Jamie is my GF and Dave is best friend.
Dave is quirky and a little nerdy and always got under her skin but he was always trying to sneak peeks of body or down her shirt. He even crept to a door once we left open while she was changing.
Jamie is gorgeous and frankly out of my league. 5'3 108 blonde, blue eyes, large 34 C/small 34 D and completely shaven. She liked showing off some and when Dave got married she hated his wife and showed even more just to piss her off.
During sex we would often talk about threesomes or seeing her with another guy and eventually we got drunk one night and fueled by drunkenness, hate for Dave's wife and being horny from fooling around Jamie agreed to put a plan in motion that involved Dave getting the head I knew he fantasized about because he shared with me. However Jamie discovered Dave had a big surprise that led her to do more.
I can gave the history and the details if it sounds like an idea that interests you.