I would also urge you to make the following distinctions:
1. Focus on "compassion" toward her, and not "support". She does not deserve your support when she is acting wayward.
2. Focus, not on "How will she react if I do or say thus-and-such? Will she be angry? How will her reaction make ME feel?", and instead strive for "What is THE RIGHT THING TO DO in this situation? What is the thing that God Himself would have me do, if He were standing right in front of me?"
It's a VERY small step between "support" and "enabling" when the behavior you're supporting isn't appropriate for a married woman.
