1) I presume divorce decree has not been granted by Canadian courts on basis of agreement
2) if no divorce decree passed she can file petition on Indian courts for divorce or RCR
3) summons have to be served to you and not your mother
4) as on date your mother can travel abroad as no orders passed by courts restraining her from travelling abroad
5) in case any false dowry harassment case is filed against her court may impose restrictions on her traveling abroad
6) you can engage a lawyer to fight your case but you will have ti come to India during trial
7) contested divorce proceedings take 5 years to be disposed of
8) wife has no rights on husband property inindia
9) if you are able to prove allegations of adultery wife would not get any alimony
10) you can file for divorce in Canada but if wife does not participate in divorce proceedings divorce decree would not be valid in India