I searched and searched but found nothing regards to this.
If a marriage can be annulled, even though the people wouldn't want it to be so/aren't aware it is able to be annulled, is that marriage de facto invalid? I'm not talking about obvious canon violations (getting married outside a Church sans dispensation for a Catholic), but about the non-obvious things that create grounds for annulment.
So if two Catholics got married, the one being pregnant, that issue would be grounds for an annulment (one might argue the father felt pressure to marry). Supposing though that they recognize their marriage as a good one and have no intentions for divorcing, is it invalid just because it could be annulled? Do they need to get it convalidated, or go through radical sanation? If they fail to do this, and their marriage is invalid, are they engaging in adultery?