Hi @saa76, you could call the Alzheimer's HelpLine available 24 hours a day, seven days a week. They have trained counsellors who can talk you through incidents like this, The number is 1-800-272-3900.
My husband's memory is so bad that when we do have a dustup, which is rare, I just disappear for a while. He forgets about it, and we're back on track 10 or 15 minutes later.