I think this is absolutley disgusting.
How can any two people in there right mind do something like this especially knowing they are father and daughter.
They should not even allowed to be living with each other.
Did they even stop to think how it will affect their child when she is older not to mention the kids she already has.
I would not be surprised if this child commits suicide or somthing of the sort when she is older because she will not be able to handle the stress.
This is absolutley disgusting.