Apply to Extend my mom's visitor stay

jf108

Hi there,
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My 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:
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6 D# u: J) O& Z$ _& s( R; R1. 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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6 Z1 A& j* m2 n) B7 L) O1 n2. 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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$ u" l" B1 T. ?* ?0 \Thanks a lot!