[20] It may also be accepted that a continuing cohabitation in a common residence is not necessary to establish the continuation of a "de facto relationship", at least where the parties have lived together and have not effected a permanent separation.[3] Nevertheless, the definition of "de facto relationship" suggests that, usually, the parties should have, at some stage, been "living together as a couple on a genuine domestic basis". The fact that the parties have never lived together in a common abode must be acknowledged to be an indicator that they have not "lived together as a couple on a genuine domestic basis". This indication will be especially significant where the parties have not shared the common burden of maintaining a household. It would be a wholly exceptional case in which one could conclude that a man and a woman, who have never lived together as husband and wife in a common residence, and who have never made provision for their mutual support, have been "living together as a couple on a genuine domestic basis". That conclusion is not justified by the mere circumstance that the parties, or one of them, at some stage, intended eventually to marry. Such a case is one where friendship, or even courtship, has not matured into the commitment whereby the parties have so merged their lives that they were, for all practical purposes, living together as a married couple.