Well to start off there are a lot of bugs afaik. Content easily repeats itself, things break down quite a lot and scenes play incorrectly. For the NTR though so far it seemed to be avoidable, since Vivian(?)/Mom gets NTR'd only if you send her to scavenge supplies at the motel which triggers an event where she gets molested.
It would be nice to hear from the developer if the NTR will be avoidable or not. Judging by the dialogue so far there isn't really a big focus on the NTR aspect. But things are subject to change all the time.