Those are details that makes it ntr, without those details, the part of my text u cut out makes it not ntr.
Rape is not ntr, stealing physically is not the same as stealing emotionally.
Ntr is cheating, simple as that. (Netorase is a whole other branch that's cuckolding but not cheating, but I won't get anything out of explaining that lol)
If someone took your pet, you're not gonna be mad at your dog
But if your pet goes with them willingly, you will be disappointed with your pet and feel like you've failed as an owner
(Not to compare a love interest to a pet but its the best analogy I could come up with

)