Something tells me she's gonna try and setup an arranged marriage or something between him and one of her grandkids, probably Himari but I can see her having them compete for it or something like that.
Honestly reading this after seeing Deadpool and Wolverine all I could think about was when all the Deadpools stopped fighting because they saw Peter and wanted to hug on him. The Reds did the same thing here with Idola lol
So I'm a spider so what?
Roll over and Die (the novels specifically as the manga has cut and altered alot of content, also I keep forgetting it's NOT an isekai despite having a lot of the usual tropes)
I've noticed over the years that ecchi series very seldomly get hentai mangas or doujins while more family friendly series get TONS. Just look at Highschool DXD, it barely has any and it's considered one of the most popular ecchi series ever while Demon Slayer and Pokemon are flooded with hentai...
Honestly the lesson at the end of the day is moderation. Both sides take it too far in the extreme so depending on how well written this ends up being we'll likely see the characters come around to that idea over time.
That being said the whole "big scary demon turns into cute little thing"...
God I was hoping they'd bring in Yuuki's sister and have him give an emotional speech about how he thought she was dead for so many years due to their secrecy & experiments.