Glad you found the feedback helpful. Just to confirm: Yes, it is possible.
My friend told all his friends and family - when he was 11- it was a babysitter. Well, it WAS a babysitter, but years before that, it was a family member.
I was the first person he ever told about the family member, and he was 40 years old when he told me.
It's also true that the incest is 1,000 times more hurtful to confess, so that is much less likely to be admitted. Your own family member hurt you. Your own family member didn't think enough of you to cherish and protect you. Your own family member used you. Your own family member belittled you. It hurts immensely. The hurt that keeps on and doesn't let up.