Compromise used to mean that half a loaf was better than no bread. Among modern statesmen it really seems to mean that half a loaf; is better than a whole loaf.
Half the sum of attraction, on either side, might have been enough, for he had nothing to do, and she had hardly any body to love." (of Anne Elliot and Captain Wentworth, Persuasion)
I'll bet you anything you like that half an hour after they have met, they will be calling each other sister. Women only do that when they have called each other a lot of other things first.