It's also completely unbelieveable that a Forsaken and an AS couldn't find their own home. For example, simply kill/Compel the previous owner of a nice house in a city somewhere and voila, you can live there without depending on the hospitality of one of your rivals (like also Liandrin's group managed). Otherwise one live in TAR/near SG (as Lanfear, Moridin and Slayer apparently did).

This makes especially no sense if one considers that according to the WoT timeline at least 7 days lay between Aran'gar & Delana leaving the AS camp in KoD and Graendal's PoV in the beginning of TGS (where she was still ignorant of Aran'gar's fate). One can't seriously expect that Aran'gar or Delana were homeless during this time.

The whole scene was akin to bad fan fiction IMO.