I kind of understand what you are saying, BUT the girl in the facebook pictures is not the same person as the girl in the apartment. Believe me, I know!! ;)
Please help Squirrel understand this situation. Corboblanc has definitely posted pictures of Natasha Garustovich, who is either identical to the Mystery Guest at N&K's apartment, or this Mystery Guest person is someone different. Either way, we know that Natasha & our mystery guest are both good friends of Nora & Kiko.
If anyone has several close-up pictures of the Mystery Guest's face that we could compare & study, this could be settled. The guest appears to have a widow's peak on her forehead, and Natasha has subtle but definite dimples at the edges of her mouth. The jaw shapes don't appear to be the same, but even Nora can look different when at work and at home. And, if the Mystery Guest is not Natasha G., then who the hell is she?
Personally, I wouldn't be surprised to find out that the guest is Natasha's sister, either.
Squirrel should have been compiling a photographic dossier on Mystery Guest long ago...oh well, I just got distracted by Leora's loveliness...that's bound to happen to even the most dedicated CamCaps researchers... ;)