How to pronounce“half sister”in English

found enduringly amusing as he explained to a young lady from Baltimore as she sipped a cloudy drink from a Martini glass.A young lady-- his half sister, the context being they both spotted the dogcatcher shamelessly hitting on the Asian studies professor, though if hewas forced to be completely honest, Marvin would have had to admit that his injection of sister fucking into the conversation was not wholly innocent