In the "old days," back in the N&K dance room days, Nora would coach, teach, and direct younger girls in dance and choreography. It isn't that she's self-centered, it's that she's apparently become a house mother to girls entering the workforce of the Barcelona entertainment and modeling industry. Nora's been there, and now she's the mentor for the younger ones.
Barcelona is big-time on tourism, night clubs and theater, with a huge Russian ex-patriot community, so I don't think anything nefarious is going on with these girls. We're not talking about a whore-house here, obviously. Just girls who want to be stars in the entertainment industry. Or FSB spies.
Of course, only Kiko would know for sure. 8) :D