is canada allowed common law and regestered both wife

[Siouxie]

To tell the OP that she cannot be sponsored as her partner is already married is incorrect.

According to the manual IP08 (applications for Common-law or spouse in Canada) you can be sponsored as a common law partner (providing you meet the 1 year criteria) even if your partner is still married. However, the sponsor can never sponsor their legal wife at a later date.

http://www.cic.gc.ca/english/resources/manuals/ip/ip08-eng.pdf

5.24. Sponsor or common-law partners still married to someone else

Persons who are married to third parties may be considered common-law partners provided their marriage has broken down and they have cohabited in a conjugal relationship with the commonlaw partner for at least one year.

Cohabitation with a common-law partner must have started after a physical separation from the spouse. Evidence of separation from the spouse may include:

• a separation agreement;
• a signed formal declaration that the marriage has ended and that the person has entered into a common-law relationship;
• a court order regarding custody of children; and
• documents removing the legally married spouse(s) from insurance policies or wills as beneficiaries.



In this situation, the legal spouse of the principal applicant cannot subsequently be sponsored as a member of the family class.

 

[iarblue]

If he is married then you are not common law.you are his mistress.You can put a damper on the PR by proving you both have a child and are living at the same address.She will likely not be given a PR. And they may look at him very closely and beware if he is a PR and he is trying to pull crap like this his PR may be revoked and sent to his country,meaning you wont be common law he will be gone,deported.
So you may shoot yourself in the foot as he may get her here or he will be sent packing.Becarefull of what you wish for.