Apply to Extend my mom's visitor stay

jf108

Hi there,
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& r  }8 g% R! \7 j. K5 AMy mom's visitor status in Canada is expiring. We are planning to apply for her extension. I did read the application package but have two questions:

/ y8 Z; B- Y& |4 z$ o! _1. The reasons for an extension. Can we use the reason: we want her help to take care of our new born baby? There are people say it is a bad reason. Is it true?
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2. In the Document Checklist - Visitor. Proof of means of support, as specified. Since we are taking care of her, what are the required documents for "proof of means of support"?
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) N* ?% O; v  c- FThanks a lot!