That'd be my guess.
Even when I stopped BF DD#1 it took almost a year for me to not get the "let down" feeling when I heard a baby cry... or when she cried for some reason. I didn't have any milk of course, but the feeling would still come over me.
I don't interact with anyone with infants and small children so I'm not sure what my reaction would be... I assume the same as yours as I have already begun to 'leak' a little in the shower.
