Zoya and Tabu ARE Not sisters; they are very good friends. We have an idea that tabu is either a stewardess on a airline, or likely she is a steward on a cruise line. She comes to Z&L's on layovers for her R&R.
For those of you wondering why Lev never tries anything with her; he GOT his ass kicked one night a long time ago by Zoya and tabu when he got drunk and started playin "GRAB THE ASS" with tabu.
Zoya and her ganged up and beat the shit outta him.