Unfortunately, that's the first and only path I've ever played through, and entirely why this game ended up on my ignore list. If that one scene with the priest is the only unavoidable scene in the game where someone else is fucking around with a love interest, then I can just skip through it to see the rest of the game.
Yes, that is the only unavoidable scene. There's one, while early in that quest, where you can have sex with grandma while she sucks on your uncle, but if you don't go to the living room it doesn't actually trigger (although you will see it when you are checking the cameras to advance the quest).
Other than that, there's only the doctor scene where she has sex with her husband, but she's not an LI (at least for now), so it's simply voyeurism and you don't need to finish that quest anyway, since nothing is tied to it (at least for now).
The mom scene is completely avoidable, you can banish both Ava and Lilith so they don't stick around as futas.
There's the hooker, but I don't think you need to advance that one either at that point. It's required to advance it enough to unlock the alley/Bruno and advance other quests, but you shouldn't need to advance to the point where you have sex with her. Not sure if there's an option to avoid that sex scene either (been a while since I started over).
Besides, she's a hooker, so no NTR there, you should know what you're getting into.