Authors Electric

There are so many books one reads for pleasure, and admiration for the writing, but there are some stories, not necessarily by well-known authors, which strangely settle in the psyche and just don't go away. One of these, title and author unknown to me at least (perhaps you can identify it for me?) and possibly picked up in a charity shop, came with the most extraordinary and unusual premise, and with an unforgettably moving ending which I won't reveal here as you may well know who the author is, but may not have read the book. The premise is based on the second nativity of a divine child, not necessarily Jesus, to a woman who is the very opposite of Mary - a twenty-first century and very sexually experienced woman in her late twenties? early thirties? drinks quite a lot, and smokes etc, who is visited in her bedroom by a very sexy male angel. At first she assumes he's a burglar?pervert? but it becomes clear that he's not because he's gentle and respectful (and ver...