I am sorry if we seem to have missed your post yesterday! Anyway, from your last post it sounds like they are getting used to one another really good. Keep them like this for a couple of more days then you should be able to put them in the lounge. Yes it would be a good idea to put some of their litter in the lounge litter tray and as you are moving them he might chase her a bit more. Don't rush anything and it sounds like you will have 2 happy Rabbits very soon.