Thanks again Bryanna
She has a booked flight to Toronto April 9-23. The ticket is non-refundable. Also April is the only time of year she can get 2 weeks away from work. So basically it's now or never. Also the strength of her application is unlikely to improve, in fact it would worsen if her elderly parents passed away.
I've ordered the VO's notes, so I will wait till early march to apply. I have until then to find a way to strengthen her application.
She has nothing to gain by overstaying and everything to lose (her job, her right to work, her financial independence, her ability to support her parents), but if I cant convince the ircc, then it's a dead end The relationship will just be me visiting her in Thailand once a year.