It’s been 4.5 months my sister came to Canada as a visitor. I want to apply to extent her stay. I should apply at least 30 days before her stat turns 6 months, which I am good so far for this deadline. However, the process time is 215 days, means when her legal stay expires, the extension application will be still under process. Does it count as illegal staying, or submission of application is enough? Any advice or recommendation?