Soldato
Guess again.
If you let a woman live with you after a certain amount of time it is my understand that there are (Now this is America mind you) which is why I told the op to speak to a lawyer and just be clear about it.
but there aren't.
I went through this a few years back. Common-law is a myth, the only thing binding are dependents, marriage and co-signees, everything else is informal.