There are many highly dubious legal propositions in this thread and I'm not going to wade through them. I just want to offer an interesting factoid.
Before getting to the factoid, I have to clarify what I mean by "common law jurisdiction". For the purpose of this post, a "common law jurisdiction" is a jurisdiction where the law is derived from the historical law of England. In Canada, every jurisdiction except for Quebec is a common law jurisdiction.
"Common law marriage" is an unrelated term and it refers to a concept that is commonly believed by Canadians to be real but it is impossible to enter into such marriages anywhere in Canada as I've explained in
a previous essay and a
brief follow up post. So just to be extra clear, when I say "common law" later in this post, I am referring to the English tradition of law, and not to something related to romantic relationships.
Now we can get to the factoid that I wanted to inject into this thread.
In common law jurisdictions, one of the major viable claims against an ex-partner in a romantic partnership (where the partners were not married) is the claim of "unjust enrichment". Unjust enrichment is an equitable claim and so the usual equitable defences are available. See
Garland v. Consumers' Gas Co., 2004 SCC 25, [2004] 1 SCR 629, at paras 44 (unjust enrichment is equitable remedy) and 43 (courts will "deny recovery where to allow it would be inequitable").
Garland is one of my favourite cases because the factual matrix is entertaining and the opinions contain so many propositions of law on many different topics.
One of principles of equity is that "she who seeks equity must come to Court with clean hands". The Court has discretion to deny, minimise, or vary equitable relief based on objectionable conduct by the parties. See, e.g.,
KGH v. SLV, 2013 ABQB 326 at para 48. Unclean hands could conceivably include "cheating", although I'll leave it others to explore the details of this body of law. My main point in making this post is to shake up the intuitive notion that wrongful conduct doesn't matter in these kind of cases. (No advice is being offered on OP's situation.)