Wasa,
Tough situation, but lots of good responses.
I don't think you could get in too much trouble pointing her to Silentlambs. He's still technically in good standing. But we know that won't last long, so I'd point her there soon. Tell her about the section called Battered Lambs. If she reads the rest, it's not your fault.
Maybe you could email or print some of the experiences on this site, and give them to her. If she asks where they came from, say you saved them a long time ago and don't remember where you got them. Or be honest and say you'd rather not say, but you think it will help her to see that others are in a similar boat as she.
All I can say is take it slooooooowwwwwwwww. If you spill too many beans too quickly, you may have to just lie lie lie to your elders. Deny all charges of apostacy and say that, in her confused state, she mistook some things you said. It sounds cold-hearted, but I guess it gives you a back door.
Good luck,
Hmmm