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These are all private matters between you and the individual - the government does not exist to check whether your spouse/partner is lying to you. Unless you can provide /direct/ evidence that the other person did this with the intent of committing immigration fraud, (or as noted separately has committed a crime in Canada, which will likely require being convicted), the authorities are just going to say 'private matter.' Again - unless proof of intent or evidence of being dangerous.

Yep - lying to you for a /private/ matter is not against the law unless it literally amounts to fraud. The government is not going to get into either checking or enforcing 'virginity understandings.'

Sponsors are responsible for whom they choose to sponsor, except in a VERY narrow range of cases (criminality or demonstrated intent to conduct immigration fraud). There's a reason only adults are allowed to sponsor or be sponsored - because adults are expected to take responsibility for their own actions and choices.

The government is not at all responsible for whom you choose to sponsor, nor for removing someone due to an unfortunate choice.

This is one of the risks of some marriage arrangements - like not knowing someone well, or relying upon knowledge from internet, etc - and that can include some arranged marriages.
It's not something you can blame on the sponsor who has been victimized. Frauds can happen to anyone. Anyone can fall victim to such a marriage fraud where evidence is found after marriage when you can see through hidden evidence in the phone of your spouse. There should be rules and laws made to protect the sponsor if it has been found that a fraud has happened to them. If government does not take any responsibility of punishing the fraudsters, marriage frauds like this will continue to happen again and again. Marriage frauds have become very common and there must be some legal actions available in the sponsor discovered the evidence after the spouse was approved PR. If a spouse misrepresented himself to sponsor in order to marry her to obtain PR in Canada and the evidence has been discovered, the sponsorship should be cancelled.

When an immigration fraud has happened, it is no longer a private matter. Yes, lying to spouse about past and then disappearing from home after assaulting sexually is all part of the strategy of committing marriage fraud. These fraudsters are using these sensitive tactics of showcasing themselves as non-virgin and to be loyal in order to create loopholes for their personal benefits. Sponsors need to be protected and new rules should be made to protect their rights, otherwise every person is going to try the same strategy of marrying a PR in Canada.
 
I would add: for a while, and at various times, the government attempted to implement and apply various 'conditions' to sponsored spouses (eg they could lose their PR status in some cases if they didn't remain married), precisely to attempt to deal with such cases.

The result? Widespread # of cases (more than now) of physical and other abuse of sponsored spouses, who (rightly!) did not want to lose their residency status if they quit an abusive marriage. It was child's play for a PR/citizen spouse to threaten the sponsored spouse with loss of status.

So it was cancelled. And rightfully so.
These are shortcomings and lackings in the current legislation that they have found no solution to this problem. When new immigrant is being protected from abusive relationship, the sponsor also needs to be protected with whom marriage fraud has happened because not all cases are the same.
 
Sorry, two additional points:

1) Please take every possible step you can to protect yourself and distance yourself from this individual - who sounds like total garbage of a human being - and this may require seeing a lawyer or other steps. But take any steps you take in recognition that /the government may never be able to deport this individual/, and may not have any basis to do so. In other words, look after yourself in a way that is not dependent on whether that person is a resident of Canada or not. Their residency status is now a matter between them and the government.

Do everything you can to cut yourself off from this person and stay away. That probably means forgetting about what the government will do, or at least after you've provided all the info you can.

2) Please do not interpret anything those here are saying as being 'against' you. We're being blunt: you cannot rely upon the government to take any specific actions - such as deporting them - because the government's interest is different than what you think it is, what you would wish, and what you perceive.

I suspect most here have sympathy for the situaiton you find yourself in - I do - but that doesn't mean we/I think that the govt will do what you'd like, or at least, not quickly, and not without substantially more of a case.
Yes, I agree with these points. From my experience, I would say that there is a big scam going on. Even the families are involved in such marriage frauds as they want their son/daughter to obtain PR in Canada through marriage and after they are sponsored, they change all together and abuse the sponsors. These families are crazy about going abroad and can do just anything for that to happen; their son/daughter do not feel ashamed of sleeping with someone and having sex after marriage to show the sponsor that marriage is legit but they leave the relationship as soon as they get PR. In some cases, women were pregnant when their spouse deceived and left the marriage after getting PR
 
Yes, there is a big marriage fraud scam going on especially because there is no applicable law to take action against those who do this. Those who are not qualified enough to get PR themselves are choosing marriage with a PR as the last resort and they can do anything whatever possible to go through.
It actually true. Fraud is, in fact, a crime in Canada.