An unexpected evening [Mf, cheating, bdsm]

They had had a good evening, relaxing on the sofa. After some wine they were giggling at everything, the stand up show they were watching, the not particularly funny jokes they were telling each other. This was not out of the ordinary per se, apart from the fact that it had never been just the two of them alone.

She stands up and tries to do the crow yoga pose despite never having succeeded before in her life, and her lack of strength and the alcohol-fuelled lack of balance makes her topple over against the sofa. They both laugh, he leans forward to help her up, but as she touches her something happened. They look at each other and fall silent for a moment, their minds blank, then with little hesitation he reaches her, one hand behind her head to pull her closer, and they start kissing. She sits on top of him, straddling him, confused by her own whirlwind of thoughts, when she met him he was married and off limits in her eyes, and after all these years it feels almost incestuous. What is going on? How did this happen? And yet it’s as if they’d both been wanting this for so long, or at least been curious about it.