She and ex-husband William made sacrifices financially to ensure Andy got the best coaching. He trained at a respected academy in Spain, where the weather, clay court surfaces and coaching are more suited to producing tennis champions.
All the family's hard work paid off as the brothers made the transition to the pros, and Andy won the U.S. Open last September to end Britain's 76-year wait for a men's singles winner at a grand slam.
When Murray claimed Wimbledon in July by topping world No. 1 Djokovic, it ended a 77-year British men's singles drought in southwest London.
However, his earlier struggles -- losing his first four grand slam finals -- took their toll.
Judy received hate mail -- critics said she was too big of an influence on his career and rounded on her for her conduct as she watched her son's matches.
A few days, though, after Andy's dramatic victory over Djokovic, Judy was back at work instead of relaxing on a beach.
She visited schools in different parts of London as part of program she runs and then returned to Dunblane to oversee the Judy Murray Cup, a competition for kids under the age of 10.
"It wasn't my idea to call it that," she said.
Money isn't an issue nowadays for the family -- Andy's net worth was reported to be $38 million by the This Is Money website -- but Judy opted to make the eight-hour drive up north rather than fly.
"I understand the importance of community, clubs and everyone getting together to make a fun environment for kids and adults to thrive in," Judy told Open Court. "There are lots of parents helping their kids to keep the scores and lots of children playing, and it doesn't matter what level they are at.
"They're just having great fun and you can see so many people making the whole thing just buzz. It's all good fun."
Back at the pro level, Judy remains the captain of a British Fed Cup team that features two top prospects, Laura Robson and Heather Watson. She is helping to nurture them, too.
"She's a fun person to be around," the newly retired Keothavong said. "She likes to crack a few jokes and does keep things entertaining. As a Fed Cup captain she was very professional and was very into the video analysis and the practical side of things, which helped us as players."
Judy is sure to be a constant presence in the Big Apple over the next two weeks and is hoping for another celebratory hug from her son when the tournament ends.
She'd opt for a more straight forward conclusion than at Wimbledon, when Andy almost let slip a 40-0 lead in a thrilling, marathon final game.
"Suddenly match points came and went and then deuce, and then there was break point down and my heart was absolutely thumping," she said. "I could hear it. I was aware of it.
"I was like, 'Oh, God.' Bump, bump, bump, bump.' "