And possibly she may by then have already taken a sip of Joran's beer or drink "You HAVE to try this!" which was not his at all but laced with roofies.
My understanding was that people from one group asked her to walk with them, but she replied that she was going to walk with the group that a little further ahead. I think she left the first group to try and catch up with the second group and that may be when she was nabbed.