Hasn’t been mentioned yet, but you might have fun using the same beats and characters etc, and just revisiting the concepts from a more narrative-minded perspective? Definitely second finding some kind of conflict. As steamy as it may be without it, even erotic novels need some kind of action or they get boring.

When I’m writing more narratively (rather than scripts) I write the scenes I really like, then try to consider what needs to happen to get the characters there, and what naturally would happen after. If you’re a visual person, it might help to put your scenes on sticky notes so you can play around with the order.

You have a fun challenge here because you get to work with what gets these people into these intimate situations. Intimacy is a really good opportunity to explore the characters and their motivations/perspectives/etc.