NTR = A Japanese porn acronym that has 3 different meanings depending on the porn content and your pov:
1. Netorare = get cucked without consent, a betrayal cucking, a cruel cheating of your partner where he/she might leave you for a better lover.
Example: She cheated on me and I wept, she loved my pathetic sobbing, she broke up with me after finding a better guy
2. Netori = you steal someone's wife/gf/girl.
Example: I stole George's girl, he saw us in his house having sex, George wept in front of us having sex, we did not care
3. Netorase = plain cuckolding, cucking with consent, you are willing to be cucked and she has your blessing to cheat on you.
Example: I told my girl to cuck me and now I am a pro cuck, my girl loves to cuck me and I love it too, I'm very happy with my cuckold life