HELP!!

I have tamed 2 feral cats 1 is a male and the other is a female which are now in my home!! I also have an 18 year old female cat. She let the female feral who is the boss!  I live in a small town in Colorado that people have abandoned cats.  It gets extremely cold as I live in a mountain town.

I now have a TAME pretty white cat that I believe is a female which I have been feeding for the last few weeks.  She lives outside.   She has adopted me and she'd have no problem coming inside.  I have a huge heart and love cats but am worried about her being outside in the cold and snow,

Here's what help I need:  since winter is right around the corner should I have her to come into my home?  I am afraid about my other 2 females and don't want to have cat fights.  My male cat is at the window whenever she is there.

I appreciate all the help I can get but I am aware that it's my decision.

Mary

madams,

Thank you for saving the feral cats.

Since the white cat have been fed by you and tamed and comes in to your house, is there a particular spot that she likes to rest? And is the place where she goes into is away from the other cats? You can fix that spot and let her own the space and proably she'll stay in for the winter and hopefully get along with the rest of your kitties.
Are your indoor cats spayed and neutered already? And any idea is the white kitty fixed?