Donna and Peter (shown here on the day they got engaged) had been together 22 years when he came home after Iraq.
Five weeks before his return, Donna had a one-night stand with a soldier. Peter sensed it when he came home.
"Two hours. I wish I'd never done it. I had never been unfaithful before," she says. "He said he forgave me but it didn't lie there."
Donna and Peter began to argue - and a year after he came home, he hit her.