No, she probably just uses both sites like you do, you caught her eye on one and she messaged you on the 1st, then was checking out the other site and "Oh hey, its the same guy I messaged yesterday?" clicked on your profile on that site as well.

And asking you how many women you slept with is kind of weird. If I were in that position, I'd find a playful way to avoid answering until I found out what kind of answer they were looking for. For some women there can be too many or too few. Maybe she was looking for "virgin sacrifices" or something. It is a really weird sort of question to ask someone right off the bat, and often a really weird question to ask someone in general.