Luna's Anxious and Aggressive Behavior

Ok so I have a cat that I rescued in April. Her name is Luna and shes around 3-4 years old... We don't know much about her background other than she was a stray but must have had an owner at some point because she has a scar from a previous surgery. Shes always been very jumpy but very sweet and loving. When we brought her home we already had a 1 year old female Bengal mix named Sully and while it took some time they eventually become friends. She still remained very jumpy but overall happy. Well 2 weeks ago we rescued a 14 week old male kitten and Luna hates him. We've being trying to slowly introduce but it hasn't been going to great. Sully loves the kitten and is always playing with him but Luna can't stand him. Not only will she lash out at the kitten, but at Sully as well, if the kitten is around. Luna has also become less social and can sometimes be aggressive with me and my fiance. We do keep the separate for a good chunk of the day and when he's locked in a different area of the house Luna is mostly fine but if she sees him she turns into the meanest cat ever. We currently have a Feliway multicat diffuser in and Luna also has a Sentry calming collar. We've also been using a natures miracle spay which seems to help a little but tensions are still very high in the house. I just want my loving cat back. We try and give Luna some one on one time everynight so she doesn't feel neglected or jealous. Does anyone have any suggestions? 

Welcome to TCS colleenh1212. Cat intros can be a tricky thing. Sounds like you are doing a lot of things right. I have not much experience in this area. The only go at it I have had, took a really long time and both of my girls never became close. Measured tolerance was our result. Cats are territorial and not so fond of change when they have been comfortable. There is a lot of cat introduction info here on TCS. You might search some of the older threads using the search box up top while we wait for better input than I can help you with.

Hi @colleenh1212 and welcome to TCS!

It would be ideal if you could slowly and carefully do introductions.  It works much better that way.

This article takes you through the process.

 [article="32680"]How To Successfully Introduce Cats The Ultimate Guide​[/article]  

Thank you both for the welcome and advice