You don't have any reason/duty to return the call. This year, we too, had at least 2 phone calls from relatives that never kept contact and they were long lost cousins and with the bad winter these relatives of the Midwest, phoned us in the Southwest. I figure they were with cabin fever and some get into the face book and they get curious and next thing you know they are calling on you. If it has been a long time, and they phone you, to me, it is "what do they want with me?" after so many years? My parents were in the same situations and it was just that, they wanted something, like = "we are selling tupperware, or we a into fuller brush." But before that, it was, we should get together more often, come over for a dinner and the next thing you know, they want something. So, if you feel best staying in the cave, minding your own business, great! Stay there!