I believe her.
I've been wondering if DJT could have told nearby BG personnel to leave while he was shopping (..."May I help you find something, sir"... / "...No, as a matter of fact, I'd like a little privacy, please...") kind-of-thing.
Even men who don't plan on SA may clear out an area if he's interested in asking a woman out, etc. I've had this happen in a ladies' room, no less. This man came in and told the other woman to leave (we were in mid-conversation, mind you). When I emerged from the stall, (still thinking the other woman was there and continuing the conversation), I saw that I was alone and he was just standing there. He got away with actions like this because it was his company (he also had someone leave a note in my locked vehicle).
I mean, he's a psycho (obviously) but I still can't believe my work friend would agree to leave me alone in a ladies' room with this man. See..? I'm still a little traumatized by this and I was never the victim of SA. Of course, this attack has stayed with her, poor thing.