Bex Wickens said Mags Lunn was “an incredible human” after she transformed her three-year-old’s shopping experience.
Her son Hudson used to find shopping overwhelming, but Ms Lunn has gone out of her way to look after him and he now makes a beeline for her and gives her hugs whenever he sees her.
His mum said while some shoppers would stare and make comments if Hudson got upset in the store, Ms Lunn and her colleagues would work to defuse the situation and help him calm down.
The shop assistant in Asda, in Darlington, even made him a green branded T-shirt to wear.
He even has his own mini-supermarket at home and likes to visit the real shop regularly with his mum and baby sister Tiny.
Ms Wickens said: "Mags truly is an incredible human – I love watching how they are together.
"Hudson hunts her down every time we go shopping and goes back in at least five times to hug her – which is special in itself because he’s not all that big on affection.
"She’s just always totally amazing with him.
"She’s witnessed the meltdowns that shopping used to cause and made him feel at ease in an environment he’d usually find overwhelming.
"Just by being herself she’s made my life easier. She loves him just as much as he loves her.
"She’s told her family about him and Hudson will tell anybody who will listen about her.
"In the last six months he’s built friendships with most of the people in the store, but everybody knows Mags is his golden girl."
Ms Lunn, who’s 60 and has a son, Mark, and three grandchildren, has worked for Asda for 20 years.
She said: "Hudson really is such a sweet little boy – he’s just so adorable.
"There’s just something about him. He’s such a lovely lad. He makes my heart melt.
"One of my grandsons is autistic so that is why I feel I relate to Hudson so much.
"I always get a hug from Hudson every time he comes in.
"Sometimes he goes out of the shop, comes back in and crawls under the barriers to get a second hug – and sometimes he gets a third or a fourth."