A more realistic approach whould be to loose interrest in the woman. Don't think she'd be more involved with you romance wise if she'd know you killed her pets, not to mention her sex toy/sex mate/partner.
The main character is basically spying on her - and on a bunch of other characters... She showed no interrest in him. If anything that's voyeur/privacy invasion/stalking.
The only two characters the MC is involved with that i know of are his sister the cute little redhead, and the village chief. Those two don't fuck around - that i know of - so there is not NTR per se.