Fiancée liked to talk dirty to me, husband to be found out and decided to teach her a lesson. [FMM] [cheating]

Fantasy story below – based on a dirty desire!

This came to a head last week, and has its roots going back a number of months. I work with Emily in a large multinational company, me in IT and she’s in finance. While there’s always good friendship between us, we both always wanted to spend a day fucking, just to see what it would be like and for the fun of it. Emily is engaged to Dave, an all-round good guy. While Dave knows his wife to be has a high sex drive, he doesn’t quite realise how high it actually is, and the kind of things Emily fantasises to me about.
For quite a number of months, there has been plenty of sexual texts between us, the things we might do to each other if we got together and the odd nude picture, here and there. It’s all been good fun, but despite the desire, nothing has ever come of it, until last week.