His name is Xavier (or whatever) and you both have been married for 5 years and he knows you very well and can read you like a book

So he obviously noticed when you were stressed out or nervous, you'd be spaced out and holding yourself during the day and sleepwalking by night

He woke up in the night to pee and didn't see you in bed, but saw you roaming around downstairs in the living room, sleepwalking