Sabina Marsden’s family recorded Stacey George, 46, telling their mother ‘God you stink’ after taking a blanket from her knee, leaving her crying and half naked.
Her daughter, Gina Owen, could only watch as the abuse was live-streamed to her phone from a secret camera in her mother’s home in Kettering, Northamptonshire.
She ran home to comfor her tearful mother, 78, and ordered George to leave.
The carer then continues to eat the rest of her pudding before picking up her handbag and leaving he house.
Mrs Marsden’s family released the footage after she was given a caution after admitting assault.
Gina said: ‘Within ten minutes of my sister Mandy leaving the house I was watching it on my phone and she slapped my mum four or five times.
‘We only put the camera in because we thought she was being lazy. I didn’t expect to see that, I was shocked. I felt sick.
‘When I came into the house to see her, I came in so calm and just said, “I’m sorry, I’m going to have to let you leave because I caught you slapping my mum on the camera”.
‘She asked how long it had been there and I said 20 minutes, half-an-hour.
‘She looked at my mum, carried on eating her yoghurt and said, “I’m sorry, what do you want me to do?”.’
Speaking about the caution she said: ‘I’m not happy she got a caution because mum was just sat there not doing anything. My mum doesn’t speak, she’s Italian, all she said was “mamma mia” when she got hit. My mum couldn’t hit her back or nothing.
‘She couldn’t tell us – if that camera wasn’t up I think it’s been going on a lot longer than when that camera was fitted, from when my dad died.
‘I’m just glad that camera has been put in place and she’s been caught.’
George no longer works for Mega Care. Chief operating officer Winner Lawal said George has since left the company.
He said: ‘We are appalled and disgusted by the actions of this ex-staff member.
‘Of the 22 months that we cared for Sabina, this same staff member provided more than 96 per cent of the total visits. Sabina was the only service user cared for by this member of staff.’
Northamptonshire Police said they would meet the family to discuss their decision not to pursue further charges against George.
A force spokesman said: ‘We can confirm that we investigated reports of an assault in Seagrave Street, Kettering, which took place on June 13, 2017.
‘After a thorough investigation and a review of all the evidence, a 46-year-old woman was issued with a police caution.
‘Safeguarding vulnerable people is a high priority for the force.’
The family are now pursuing legal action against Mega Care.
Lauren Kennedy, of Seatons Solicitors who act for Mrs Marsden and her family, said: ‘Sadly, cases involving the elderly and the vulnerable as victims of abuse and mistreatment are becoming increasingly common and it has never been more important for families of those receiving care to keep a close eye on their loved ones.
‘Mrs Marsden’s family felt let down not only by Mega Care to whom they entrusted their mother’s care but also the Criminal Justice System which saw the offender being issued with just a caution.’