回复：我的妻子竟然是个骗子！请帮帮我

If what you claim is true,

--Your wife is guilty of bigamy (hopefully she has only 2 hu*****ands)

--Your marriage was void from the begining.

--She might have provided false docummens to get immigration papers in Canada, or at least illegal entry.

--maybe you can also sue her for fraud (?)

anyway, many ways to "threat" her