Background: My ex GF and I were in a mono relationship, although I came from a background of swinging, open relationships and all that.
About two years into our relationship I noticed every so often there would be a dramatic change in how her pussy would taste. I grew suspicious and drew up a timeline. I noticed the change straight after whenever we were apart for a few days.
I quizzed her and she denied it, but with every deep lick the difference was clear. I was probably licking her man’s cum out of her. Initially the thought repulsed me, but after a while I actually grew to LOVE it. I loved tasting him in her and knowing she was fucking someone else.
I broke-up with her after about a year of that. She later confessed I was right. I don’t like how it happened, but it did open doors for me mentally. That’s another story.