Our godson, a confirmed Catholic, began attending a Mennonite church with his girlfriend when he was 17. Evidently he made a public profession of faith in that church when he was 18. He no longer attends Mass. Next month he (now 20) is planning to marry his girlfriend in the Mennonite church.
Can a baptized Catholic’s marriage outside the Church be valid? What are the duties of Catholics (godparents, grandparents, aunts and uncles, friends) regarding the attendance of such weddings, and what is the charitable action upon receiving notice of such a tragic event?