I think she realizes that she needs them in order to keep the apartment open. They were really receiving a ton of complaints about the fighting going on (especially about Nora and Jenny and Rita) in the house and so forth. Nora is not dumb. She realizes that if she wants to continue to make money with that house, she needs a solution to the problem of customer dissatisfaction.
I totally agree
Even Nora herself has started showing a lot more skin then she has in the past
spreadies on the couch with the girls
Joined in the fun and games
she has even started some of them