Here are relevant references from the Books where an Ahn Girl is mentioned.
I make no pronouncements on these matters, but report them as I find them.
Arrive at your own conclusions.
I wish you well,
An Ahn girl, usually a paga slave, is delivered to a given address for an Ahn or so, or even an evening, a morning, or a night, and is then, later, picked up and returned to her master, a tavern or such. Ho-Tosk, and the proprietors of the better taverns, seldom furnished Ahn girls. The major reason for this, as I understand it, is the "monitoring problem." A slave out of reach may be a slave at risk, or even a slave stolen.
"I am not an Ahn girl!" I said. An Ahn girl is one who may be taken from the tavern and used elsewhere, for an Ahn, or more, or even overnight, or longer. Such arrangements must be made, of course, with the master.