Talking to the priest* is* great advice.
But is she open to talking about faith at all?
Well, here’s one thought I had - maybe it would work. I’m not sure, maybe someone here can comment.
Make it about YOU and what’s bothering you. Get some time alone with her. Go out for coffee or something and say something like this:
“Can I tell you something really personal? Because there’s something happening that really has me concerned, and I really don’t know how to talk about it. It’s about our faith.”
See how she responds. If she seems open to it go on,
“Well, we’re taught that we must go to confession before receiving communion. That we should be in a state of grace. Sometimes I wonder that I am, that I’m receiving the body and blood of our savior properly because, as you know, we’re damning ourselves by receiving it unworthily, you know? I mean, in 1 Corinthians 11:26-30 it says if we eat and drink unworthily we’re drinking damnation upon ourselves. I mean, if we’re not in a state of grace, if we’re in sin, we shouldn’t be taking communion, right? This is pretty serious. We shouldn’t take communion like that. Anyway, I was thinking about going to confession and talking to a priest about it. Would you be willing to go with me?”
BWAHAHAHAHA…ahem. Anyway, you get the idea. Make it about you. Talk about why it really bothers you. Usually these people make these mistakes because they don’t know…they don’t know what scripture says. They don’t know why the Church teaches what it does, that we must be free from mortal sin. Making it about you will be like slipping her the information on the sly…
If she’s bright, she might ask if this is about her. If she says something to that effect, tell her you really wanted to know for yourself, but that you did wonder how she felt about it because she seems to go every week. And leave it like that. If she’s smart enough to connect the dots, she will.