Aren't we all overreacting.
Aman staying at Ragini's house could be for numerous reasons. Remember we don't know the story of those 9 months after N left. It could be that BB's goons were coming and threatening Ragini. Aman started staying at her place to protect her.
It is hilarious but it is EK show. Anything is possible. Maybe N forgot to pay BB.
There is nothing logical about the show any more.