For 29 years, while my mother-in-law was alive, I was required to interact and/or be around my wife's oldest brother and his family. My brother-in-law never offended me face-to-face, but he actively insulted me and my wife (his sister) when we were not around. Others would tell us what he was saying, and as his children reached adulthood, they became bolder in insulting me. For 29 years, I bit my tongue to keep peace and to not upset my mother-in-law, even when, in her last years, he insulted her. [My wife and I had lived next-door to her parents 23 years.]
My father-in-law passed away in 2004, and my mother-in-law passed away in 2009. Over the last 10 years before my mother-in-law died and for 8 years after she died, I had occasional night-mares involving my brother-in-law and members of his immediate family. I always awoke with intense anger. When my mother-in-law died, my wife and I never had to see her brother or any of his kids again, but I still had nightmares (about 1 every 9 months or so).
Finally, about 2 years ago, another brother-in-law's daughter died and I went to her funeral. Not surprisingly the first brother-in-law and his wife showed up. I ignored them the whole time. But that brother-in-law could not let me ignore him. He came up to me after about an hour and, smiling big, said: "What, Terry? You don't recognize me?"
I raised my hand, showed him my middle finger, and said: "l'll see you in Hell." He walked away, and I haven't had a bad dream with him in it that has bothered me since.