text: Yep NTA, my mom is a practicing Catholic. My sister is getting married and she is not, neither is her fiancee. My mom is ok with them eloping, it's cheaper and it doesn't make sense to have a full Catholic ceremony for two people who aren't Catholic. It is the equivalent of having a "play" or charade of a Catholic ceremony, none of the essential actors are Catholic, they would only be pretending. It no more Catholic then eloping. Her feeling is if they ever convert they can just do a Catholic ceremony further down although she doesn't expect my sister and her future husband to convert at all.