!cuckoldcaptions@lemmynsfw.com is probably the closest. There is also a !hotwifecaptions@lemmynsfw.com which has barely been used. But I'm sure if you create a cheating caption community people will come.

So happy you're posting here! I was worried you gave up on lemmy.

She calls my cock the most beautiful cock she's ever seen

Have you considered sharing pictures on here?

Staying safe!