"I am both Muslim and Christian." (She's an Episcopal priest! No wonder that church is in trouble)
This is the problem with treating religion as mere personal expressions of spirituality rather than truth claims.
Some people talk, especially about religion, as though the law of non-contradiction isn't true. Contradictory religious ideas held together is considered by some as deep wisdom. People may talk that way when it comes to religion, but they don't live that way in the "real world." Someone like this needs some shaking up.
Smack her in the face and ask if there's a difference between being smacked and not being smacked. Only a fool would insist there isn't. (For the sake if illustration only, of course. My religion wouldn't allow me to smack someone gratuitously. But then I take my religion as making truth claims.)
If she makes any morality claims they should be ignored because they're meaningless. If she thinks contradictory things can be affirmed at the same time, doing something wrong and not doing it is a meaningless distinction. We couldn't even be sure which she means.
The sad state of clear thinking and morality today makes me worry what she'd answer if asked if she was a woman and a man, too.
One can only confess both Christianity and Islam if she misunderstands them both and treats religion like she chooses ice cream. She can have both strawberry and butter pecan, but she can't have both Christianity and Islam.