I used to have a fairly regular nightmare that went a little something like this:
Guy meets girl, guy starts shagging girl, girl and guy tangle together, sexily. Their limbs slide over each other, their hands grip flesh. His fingers dig hard into the crack of her arse, the way he does so gorgeously with me. They see me approach but they don’t care.
I’d dream about this quite frequently – a side-effect of an intensely jealous feeling. Part paranoia, part justified worry. He’d never actually do this, of course – not to the same degree. But in the dream it wasn’t the sex that bothered me so much as the openness of it. The fact that, when I approached the tangled, tousled couple, giggling and snogging and touching and worse – as I watched my fucking boyfriend fucking hard with someone else, he’d shrug and brush it off like his betrayal was nothing.
“Oh, didn’t you know? I’m with her now.”
They’d carry on, as I stood stunned and watching. Stuck in the moment, unable to escape until the second I woke up.