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:

) M/ M: V, k( g3 Z: x! ~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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7 _! ^! w% L7 C( o7 y0 W2. 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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7 D1 Y% W* l. r2 R- ?, JThanks a lot!