A married chef who lured a single mother into having sex with him twice by impersonating a female exorcist was sentenced to two years in jail by a court on Friday.Man Ka-ying, 42, posed as a female spiritual master called “Black Rose” and instructed the 30-year-old victim to have sex with him in order to purge her four-year-old son whom she suspected was “bewitched”, the District Court heard.In passing the sentence, Judge Katherine Lo Kit-yee said the offence was “despicable” in that the…