We have records of the daughters funeral in the towns newspapers. It was well attended and there was a viewing of the body afterward. Many people would have had to have been fooled/in on it from the very beginning.
The records dont confirm that there was a open casque viewing, but if there was, how recognisable is a mother vs her daughter if she just died of tuberculosis? In fact the funeral was very fast. She was buried the day after she died.