first off is she still married to the guy that went back to taiwan?

the address is explainable. / if she is married then she cannot be in a common law relationship. /

but if she is not married then all she has to say is that he lived in his own room, that it was not a communal relationship.

in otherwords, he did not sleep with her and that there was no 'relationship' between them.

Well she should not say it on its own, she also needs friends to confirm her story.

Also, at least here in Ontarion, the communal property is assets acquired after marriage. so he would still not be able to claim it.

but her friends should also confirm that the relationship was strictly that he rented a room.

if he wins, then that would be an extremely dangerous precedent.