The offer is definitely there for the attic, but I would be very wary of integrating a cat with Kylie unless I was 100% sure there would be no aggression. I know it is a different situation, but a couple of months ago, one of the tortie visitors didn't manage to get away from Kylie in time and there were clumps of fur everywhere. I was fussing her on the fence a few days later and she had a nasty gash. I kept an eye on her in case it got any worse - luckily it didn't.
I have left a message with Silvana at Romney house to see if she has any suggestions, although I don't want to put her under any more pressure than she is under already.