Let's say I daily offer water to one specific holy plant. One day i'm in a converstion with my new neighbour for the first time ever since he came(after many months).
ME: I'm quite religious.
HE: Yeah, I've seen you offer water daily to that plant.
ME: Really? I didn't know I was 'being secretly watched.'
I'd like to replace 'secretly watched' with another one word that can imply the same meaning.
It could be of any form. Please feel free to re-phrase my line, if needed. I feel like there is a one word for that.
I'd appreciate any help.