We would like to extend my mother's visitor visa, so she can stay with us for more than six months. She is already here in Canada and she has multiple entry visitor visa till 2023. I tired to apply online for visa extension but its not allowing me, could you please share your experiences. My wife is expecting and due on January 2019, so it will be nice if my mother can stay with us without going back to her home country and coming back. Kindly advice.