Spooky but

Mirror Mirror - Anthony M. Strong

Nicely spooky and a very nice story in terms of how the ending is handled.  I do wish that the girlfriend had been better drawn as a characters.  She almost comes into her own at the end, but prior to that she comes across as little more than f**k buddy instead of the true love that both partners came.  Though, to be fair, she is far from a bimbo.