It's not a mortal sin, if the person(s) believe they are married when it's actually an invalid marriage. You're obviously not catechized on the Faith and sin, otherwise you would know that one of the conditions for committing mortal sin is consciously being aware of the sin and willfully engaging in it.

In order to not find a good lady, first, a man has to be searching for one. I haven't searched for one in quite some time because I'm surrounded by daughters of Asmodeus, demonic slobs and walking vectors of spiritual H1N1-pandemic. There are no trad Catholics around where I live, and even the women who identify as "trad" should be suspect until they prove otherwise. :farmer:

False sanctimonious piety from you. We know you're an insincere, two-legged erect pig with the Jezebel spirit. We can read between the lines.