Thanks all. Nothing like this has happened to me before, in loads of punts.
First time I met her, something came out in conversation to suggest that we both lived in, or near, the same small town. Even though I lied about where I come from, and for all I know so did she.
Anyway, location, discretion and confidentiality did come up today, can't remember who bought it up. I suspect she might be worried we'll bump into each other. Or I might stalk her possibly.
Best to move on, which is a shame as she is lovely, and as I said, at the time we seemed to enjoy each other's company. I won't use that agency again either.