I've posted about this in a few other subs, but some people wanted the dirty details, so here I am!
A little backstory: I'm a 29 year old female, my neighbors are a married couple, he's 40+ and she's 40. We live in the same building, they approached me for a threesome, and after some long consideration I agreed. We'll call her Rachel and him Chris.
I arrived to their place for dinner wearing a sweater dress (nothing too sexy) and a matching bra and panties set underneath. I bought a brand new set for the occasion. It looked like this.
Dinner was nice, white wine was flowing and we were laughing. It felt comfortable already. During dinner, Chris keeps rubbing my leg. His hand gets higher and higher until he reaches my pussy and I can't take it anymore. I grabbed him and kissed him while Rachel watched us. She took my hand and lead us to the bedroom.