Again, look at Casey's behavior to answer that question.
If my father molested me, I'd not let him anywhere near my daughter. I wouldn't live with my parents and I wouldn't leave my child alone with such a monster.
The fact that she was so comfortable leaving Casey alone with her dad tells me that she had no reason to fear him.
Now let's look at Cindy's behavior. She sits beside her husband and lets him touch her. If she believed that he were a child molester or that he had anything to do with the baby's death and covered up the death, she's be absolutely frigid with him.
Next. We have the prison phone call. The entire family believed that Casey knew what happened to Caylee. Not the dad.
Makess sense.