Mom is accusing Dad of infidelity nonstop. Any suggestions?

Hallucinations-auditory and sight are terrible to endure. Prayers going out to all who are experiencing this challenge.

I'm sorry to read about your situation. My Mom did the same thing with my Dad. It wasn't constant but when it came up it was always tough to talk her down. I'm one of 5 other siblings. We ended up telling her answers that were "indisputable" If she thought an object was given to him from a "lover" we said something like "No Mom I bought that for you... don't you remember?" If she accused my dad of sneaking out with some "other woman" one of us would have to run cover and say "No Mom, Dad was with me" Sometimes we would tell her that "Dad was with me" before she even had the chance to wonder who he was with. Same with the other objects. Another solution would be to remove a lot of the clutter. Focus on the objects that seem to trigger her accusations and get them out of the house. Or put them somewhere she wont get to. That way they can be pulled back out if she happens to be in a more reflective mood. My brother didn't like the idea of lying to Mom and I understand that but she could get frenzied and panicked over these accusations that weren't true either!
She's in a conflict mode right now, believe it or not it wont last. As her condition worsens she will become less "assertive" and more dependent. You should work on finding a long term memory care center for her. Get some ideas going now. Your Dad is bearing the biggest brunt of this. His health is of greatest concern. Triage! Save what you can and let go of what cant be saved. PS: I don't comment on other posts. I recommend you not pay attention to the back and forth of some of the comments out there either. Find a solution that fits your situation-because they are all different. Good Luck and hang in there!!

An individual does NOT have to be elderly to experience hallucinations.