An elderly resident at a care home being investigated for mistreatment allegations was taken to hospital with severe bruising, her family said.
Irene Brading, 87, spent four weeks in hospital from 3 August after suffering unexplained injuries at the Partridge Care Centre in Harlow.
Two women taken to hospital on the same day died, one soon after admission and the other a few days later.
Police are investigating and a woman, 36, has been arrested and bailed.
Mrs Brading's son John Brading said: "[She was] just black and blue. Her buttocks were black, it was really bad, and on the back of leg and the front of her leg.
"If she had fallen over I don't think that would have happened."
Dennis Brading, her husband, added: "It's a horrible thing, it makes me think every night of her.
"I can't get over it, she's been a good wife to me all these years."
There have been an undisclosed number of allegations of mistreatment at Partridge Care Centre, all of which are being looked into, the BBC has found.
Rushcliffe Care, which owns Partridge Care Centre, said several members of staff were undergoing disciplinary procedures.
It added that care standards had been reviewed and more staff had been brought in.