It is free will to have a child, it doesn't make it less important if someone else knew you would or not, does it?
Now you are changing your ground and confusing yourself in the process. You just don't understand my point that if God knows in advance what you will do, that makes you a robot because you have been left no choice. To act other than God foresaw would prove that God was not omniscient. You can't have it both ways.