Husband repeatedly mentions late ex in his sleep

DEAR ABBY: My husband of 4 1/2 years had an old girlfriend he was on and off with for 15 years. She passed away while he was in prison. We got married three months after he was released. The thing is, when he sleeps, almost every night, he says her name and how much he loves her. He says because he’s doing it in his sleep, he doesn’t know he’s doing it. It seems to upset him that I’m upset.