Just reread and caught up with the latest uploads here (I think I stopped right before Shion's debut). The relationship/romance threads have changed from a triangle into such a mess, but I kind of like how it's going! I especially like how much the characters are revealing their feelings and making it known who they like to each other. Especially this moment.
https://dynasty-scans.com/chapters/my_friends_abnormally_cute_sister_ch13#16
I'm usually very stubborn about only liking a specific pairing for each character(s) when it comes to these sorts of love webs (unless I end up rooting for a poly route). But honestly, I'd be fine with any arrangement of the characters getting together, as long as everyone ends up with somebody.
Although I'm not sold on Momo x married woman. I like Momo and it's cool that she also has her own kinky interest, but I feel like we know so little about the older woman and her feelings that I'm not sure how to feel about them as a pairing yet. She seems to be able to read people well, so is she stringing Momo along, into NTR as well, or oblivious to only Momo's emotions? Although with how nutty this series is, I wouldn't be surprised if the wedding ring was just a hoax and a ruse to get Momo's attention and/or avoid Mizuki's wrath. "A second yandere has hit the NTR freak!"