When someone suddenly collapses on the street, shouldn't you call 911 (or equivalent of your country) instead of just waiting and hope they will be fine?
That aunt should not feel guilty for liking her not-even-blood-related-niece. She should feel guilty for ignoring her and hooking up with a friend after taking her virginity however.
I haven't read many fanfictions but I really really really liked this one Princess Fresh Powder RWBY
I want to find more like this, i.e. with one tsundere character + sexy time