Later in the evening, she decided to hop into her spa pool - but any thought of a relaxing dip quickly changed.
The smell of smoke was a lot stronger, prompting her to get out of the warm water to investigate.
"I never thought it would be from my place."
With a dressing gown wrapped around her, and a cellphone in one hand, she walked around the house.
"I walked down my driveway and couldn't see any chimneys with smoke coming out but when I turned around I saw flames coming out of the garage vents.
"I dialled 111 and the fire brigade came very quickly."
While it was a nerve-racking experience, Roslyn said she was remarkably controlled, and clearly remembered fire safety advertisements on television about not going into the house.
"You don't realise how many of those fire safety ads you take on board until you live it."
Not that she would have gone inside.
"The smoke was incredibly dense and you wouldn't be able to breathe in it. It was horrid."
"The wooden posts that support the house are all really charred as well as the beams."
While the damage was significant, it could have been a lot worse.
Fortunately when Roslyn and her husband moved into the house they put insulation between the garage and house, which stopped the fire from spreading fast.
"It was very close to taking the whole house."
And they were lucky that gas cylinders for barbecues that were in the garage didn't explode.
Bizarrely, the only thing that didn't burn in the garage was a stack of dry firewood.
"It's not stuff you can dust off, you have to scrub it.
"And everything stunk.
"I've never done so much washing in my life."
Roslyn, who has been the food and beverage manager at Paraparaumu Beach Golf Club for about eight months, said while there was a smoke and fire detection system in the house, there was nothing in the garage.