That’s creepy as hell, I’d probably freak out a little if that happened. Sorry, I have no advice other than just hang in there til your husband gets home. Maybe go to one of your coping mechanisms if you are feeling triggered/paranoid?
I remember when I was younger living with my parents the tv would occasionally turn itself on by itself. It’s probably just electronic interference. Like if some neighbour is using a remote control it can interfere other devices unintentionally.
I agree with iconclast_01 and ZombieMombie. It was likely just a signal from another device. I have had the spare TV that I used to have in my bedroom come on without me turning it on as well.
Sometimes Spotify accidentally plays from another device when I am trying to use it, because it was the last one I used as my playback device. It can be awkward. Maybe ask your husband if he was trying to use spotify,or if he had shared his account with someone who was trying to use it?