She's like the movie monster where he just jorks his penits innocently shes been on the hunt for prey. Like the whole sexy goth outfit is like a indicator this really is largely about her own satisfaction, as it usually is in relationships like this (but thats just saying she's way more into him than he is to her). I think they'll do it just fine, but the main conflict is more about the protagonist loosing his innocence. The goal may actually be a gender reversed metamorphosis where he goes from mob character to faceless hentai protagonist doing kinky NTR shit.
Yet the dramatic climax of the story from the last work was also at a love hotel, but it may more or less be the sort of sordid love blossom they made, a weed with a beautiful flower sprouting a sidewalk that otherwise shouldn't have. Will the husband barge in demanding a spot on the cuck chair? Or maybe he just has a straight up mental meltdown after doing it (we're already having one before doing it lol). Or maybe he just awkwardly rolls into doing it after a while, like a normal adult. It would be really really funny if she threw him a 100k yen after hooking up. Her predominately sexual leaning vs his more cute / romantic aspects can actually be a pretty stable dynamic too.
She's a hentai character, he's actually a shojo lead.