"When the children were teenagers, they used to bring all their friends, and their cousins would be there too, there would a real gang of us on the waterfront," Mrs Stuart said.
"We might have up to 40 children and we'd be all day water skiing on the lake.
"We've taught a lot of people to ski and we've had so much pleasure out of it and it's a good family sport."
With two hip replacements and two open heart surgeries under her belt, Mrs Stuart takes it slightly easier these days, opting to start in the water on two skis before dropping one once she is skimming confidently over the lake's surface, rather than a standing beach start on one ski, like she used to do.
Either way, after take-off, a single ski is the sole way she travels.
"I have a terrible job trying to ski on two now."
She is not easily impressed by newfangled equipment, though.
"I have a really old wooden ski that I loved and I could do anything on it, but it finally fell to bits, so now I'm using my grandson's ski.
"I tried a modern one and I promptly did a head plant."
Lake Hawea is Mrs Stuart's main playground, as boat traffic there is not as bad as on much busier Lake Wanaka.
"When we first started skiing [at Lake Wanaka] ... we could ski on the waterfront and there'd hardly be a boat on the water."
Mrs Stuart was concerned a recent gash to her leg - which had prevented her from going in the water - would inhibit her water skiing skills in front of the Otago Daily Times camera yesterday.
However, after getting the all-clear from the doctor on Christmas Eve she was eager to test the waters anyway, and during a flawless display on the lake she showed no signs of slowing down.
Mrs Stuart still water skis every opportunity she gets, whenever there is someone handy with a boat to tow her. Usually, that job falls to son Lynn or son-in-law Ken Telford.
"She just loves it," Mr Telford said.
"She gets out there and has a great big smile on her face and is happy as."