I can understand your response. We are all sitting here with 20/20 hindsight and you had to make a split second decision about just what the heck was going on. And of course, we can't hear the tone on the comments either, so difficult to assess. I suspect I would have reacted the same way, being a bit flustered by such.
I truly hope that should this happen to me, and it could as I am often looking at female garments in guy mode, even at Target, I might respond with a comment that would flush her out so to speak. At this point I am truly curious as to what her intentions where. Oh, well, maybe next time. I hardly ever go to Target now without checking out, the tops, dresses and their purse section.