I like the trope of son manipulating their mom into doing some stuff. However, what Mr. Here did differently, and brilliantly, is the slow burn aspect of it. It wasn't until 2/3 to the story where they did the deed.
So yeah essentially, I am looking for this: A slow burn story, where son manipulates their mom to do some stuff.
That's always been my approach, as the whole "I say my mother/sister/aunt/brother naked and we immediately made wild sex" is just too implausible. So I've always preferred the slow-burn, as it provides the time to establish a context, so when they do the deep, it seems more logical, rational and understandable.
As no one's going to try something THAT risky, without seriously evaluating the potential repercussions, which again, provides more context for the entire story.
By the way, I wrote a LOT of 'pseudo-incest' stories years ago, mostly where the couple aren't directly related, as their either step-siblings or, in more than one, they'd not quite human, so their common ancestry is more vital than their legal relationship (different societal norms).
Yep, it was a decent story, what's more, it regularly shows up in requests here concerning inquries.