She married E.J. twice, both ending in divorce; she married Victor and Lucas, both either annulled or deemed invalid because she was still married to Trent, and that marriage was ended by his death. 4 marriages ending in divorce or annulment, and one ending with the death of a murderer would, I think, prevent Eric from marrying her in the Catholic Church. She does not have to be Catholic, but he is, and a former Catholic Priest, so I don’t see the Church giving its blessing to them, let alone marrying them in the Church. I also don’t see Eric consenting to marry her outside of his religious beliefs.