I actually had Maggie May in the house for about 10 minutes today. Then she panicked and I allowed her to leave. I will continue to invite her in. My other cats greeted her as a friend. Nose touching and head butting...no hissing at all.
Congrats on bringing her in the house. Are you gonna keep her? What about the other kittens? Are they friendly too? Sorry I must have missed some of your other updates
If Maggie May has not been vetted, I wouldn't encourage the contact with the resident cats. If she has been vetted, then good for you and sounds like soon you will have one more kitty in your midst.