I'll quick copy paste what I wrote in another thread about this:

During the brief periods when I have worked from home though I make it clear to clients that the place is not my home. By throwing casual remarks into conversation.

When they compliment the place - 'ooh yes, lovely isn't it, I was pleasantly surprised when I got here this morning, looks better than the photos on airbnb'

When they ask if you have a busy day planned after their booking - 'I have one more booking this evening, then I will drive/get the train home, and I will come back here on Monday morning to work'

So far it has worked for me, and hopefully will work again if I work from home in the future for any reason.

Iv had a few clients in past do that because I didn't answer my work phone he turned up on me doorstep one afternoon with a bunch of pink roses knocking on me door I said look ya can't just turn up yano like this without me knowing he came to see if I was alright years ago I had another 1 do same he got flyers in his hand pretending to hand flyers out and said look I don't want to look dodgy so iv got a flyer iv come to book an appointment I said would you please leave you can't just turn up on me door step like this if you want a booking ring me please i fort what's wrong with some of these men