Ok, fair enough. I know a woman who faked a pregnancy and then claimed to have had a miscarriage. When she was asked, by another woman, how it was going she flippantly said "Oh, I lost it" and then carried on talking about something else with about as much emotional investment in the supposedly lost pregnancy as you'd expect if she had knocked over a pint of beer.
On another occasion, she offered a more elaborate explanation, still dispassionately, and when I had occasion to visit her flat (not for sex) I found a women's magazine with the pages open at a story that matched the same one she herself had told.