Well, it sounds normal to me. Some cats need more time than others....and no sense ticking them off early on. My sense is that Nakita needs to know that she is #1. I would pay lots of attention to her....telling her that she is your best/favorite kitty......(then of course, tell the other one the same thing )

Keep us posted.....take your time.

It took me one year to get my bunnies to fall in love! Yes, one year and two vet visits due to bites!

Good luck! And take pictures!