Just jumping in to point out that however murky Elle's ancestry may be, her mom is at least Belgian and likely grew up a little Catholic. Going to church on Christmas Eve/midnight mass is something vaguely Catholic people just kind of do. It's not a sign of some major shift in her life, I'm not even sure it's Fishy's influence. My (actually Catholic French Canadian) grandma always took us to midnight mass. My (raised Catholic but not at all practicing) mom kept taking us after she died. Even now that I don't live in the same province as my mom, I still try to go to midnight mass because it's just kind of a nice warm and fuzzy Christmas tradition - and I was definitely raised areligious by said Catholic mom and my Jewish dad. She probably went to Christmas mass because her mom is in town, nothing more.