My dad installed CCTV cameras as he is convinced my mum has been cheating on him

DEAR DEIDRE: MY dad installed CCTV cameras where my mum works because he is convinced she has been cheating on him.

They argue constantly and he accuses her of all kinds of things.

I really worry about them and their relationship, and I don’t know what to do.

I’m a 26-year-old guy and still live at home while I complete my studies.

My mum, a caterer with her own kitchen premises, is 55 and my dad, 57, is an engineer.

I have an older brother, who no longer lives at home.