Aw, c'mon, Lou, I only slugged you with a big ol' feather pillow... HARD, but only a feather pillow. You just got finished telling Martelo that you wanted to know if your fly was down.
Do you have to go to church with her? If she says she wants to start going to church, why is that YOUR signal to call and find out about groups and plan on going to a couple of groups yourself. Can't she just go by herself?
If you do something alone and she "acts" insecure, let her act that way. Why to you need to rescue her? Is the experience actually causing her any harm?
You're setting yourself up. I predict that in a few weeks you'll be posting (complaining) the following: "BB does not like the new church. The people are too <choose one: unfriendly, friendly, stuck-up, nosy, high-class, low-class>. But *I* really like the group that I've been going to, and that makes her jealous because I've made friends and she hasn't. So now I have to stop going to the group because she wants to quit going to that church."