Is it impermissible or permissible for a man to remain in Canada if he married the first girl for the purpose of residency, then divorced her after obtaining it, and his child from her lives with his mother there?

A person must repent from adultery and address its consequences. The ruling on marrying a woman with whom one has committed adultery, without her repentance, is a matter of scholarly disagreement, as is the attribution of a child born from adultery to the adulterer. The ruling on his residence in Canada remains conditional on his ability to observe the rituals of his religion and his safety from temptation.