She is quite beautiful! Houdini Girl is just asserting her position in the home, you know, Alpha female and all. I'm sure Molineux will get to know her status soon and all will be well!
She will eat in the same room as them but is still a bit nervous when the others get to close to her. She is used to living on her own so it will take a little while for her to get used to them. Houdini and her, or the twins as I call them, are always growling at each other.