Eman weighed around 500 kg when she was brought to Saifee Hospital here in February.
A complaint has been filed at VP Road police station by the authorities of Saifee Hospital.
"Hospital authorities filed a written complaint with us against Shaimaa yesterday. She had tried to put water in Eman's mouth, despite being told that she must be fed by tube only," a police official said.
Nurses, who were on duty during the incident tried to stop her but, she allegedly pushed them, the official said.
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"We have received a complaint from Saifee hospital. But, we have not registered any offence against her," Sanjay Kamble, senior police inspector of VP Road police station, said.
"Shaimaa had tried to put water in Eman's mouth. She is her sister and her act can not be termed as an offence," said another official.
Shaimaa and the Saifee hospital management have been locked in a bitter tussle after the former alleged that the doctors treating Eman have made "false claims" about her weight loss and "complete recovery" in a video released recently.