Incest Survivors Support Group
Incest refers to any sexual activity between closely related persons that is illegal or socially taboo. Consensual adult incest is very rare. Incest between adults and prepubescent or adolescent children is a form of child sexual abuse that has been shown to be one of the most extreme forms of childhood trauma. If you or a loved one is a survivor of incest, join the group...
I, personally, think that her comment is ridiculous. Stay true to you and what you're comfortable with and ready for. No one can force the healing process on you, you take steps as you go and as you're ready.
She can encourage you to talk, but not to require you to. Does she get the difference?
You don't have to say anything you don't want to - and shouldn't.
If I had that happen to me, I would quit the group. Even if you prove that you were right, are you going to feel safe in that kind of setting? I don't know if I would. The leader sounds like an asshole.