Question: Who laced the cookies that were given to the children with arsenic? It's never shown who applies it, only who takes the cookies to them.
Question: It's been established that the grandfather has no knowledge of Corrine's children. When they come across a copy of his will, it states that if it was ever discovered that Corrine had children from her first marriage, she would lose everything. Since he never knew he had grandchildren why was this clause ever added?