Hi —

   I’ve been searching for a mystery I read in about 1974 — it may have been several years old when I read it. Don’t know the author or title. The story takes place in NYC — a young medical student murders his pregnant girlfriend through some ingenious medical means. The friend or roommate of the murdered woman falls in love with the medical student and later figures out the truth about him. Since for some reason she cannot prove it, she marries the (now) doctor as a kind of daily punishment for him, with the truth disclosed in a letter kept with her lawyer “in case anything happens to her.”

   I believe the author was a woman. The book was well written, and I’ve been wracking my brains for years trying to come up with the title and author. Seems the title had something to do with her ironic “punishment” of the murderous doctor. Any idea?