As if losing a child isnt heartbreaking enough, imagine being told the child you buried isnt even yours. Thats no nightmare, but instead reality for a Brooklyn couple. Justyna and Rafal Sliwa shared their story through tears and with their attorney by their side. The horrible mix-up they said was the fault of the New York City Medical Examiners office and Bellevue Hospital and theyre holding everyone, including the city of New York, responsible in a claim filed Thursday for $5 million.