You said the sight of her seems to bother him more than anything elce? For temporarily, untill you can find somthing better, would it help perhaps, to put a devider between their cages? (cardboard, a blanket, or somthing) I know he would still be able to smell her and all, but sience thats the only room with a/c, maby that could assist a little, out of sight, out of mind?