A young woman has a child and she is no longer with the father. The woman is also estranged from her mother (her mom blocked her phone number and the daughter has no way to contact or even know where she is). The woman drops her child off with the father for the weekend while she goes to visit family across the county. When she returns to get the child, the child's father tells her that her mother unexpectedly stopped by. The woman flips out and tells her baby's dad that her mom is not to see her child without her permission. The dad says if the grandma comes by, he's not gonna deny her to see her grandchild. The young woman gets mad, tells the dad f--- you, and leaves.
Later that week, the woman tries to call her mother from her friend's phone and she answers

. She basically tells her mom that she's is not to see her grandson without her permission. Grandma gets mad and says it's none of your business, I can see him if I want. Hangs up and blocks the friend's phone number.
Yes, this is from Teen Mom 2. Is the baby's father wrong for letting the grandma see her grandson without permission from the child's mother if she goes over to the baby daddy's house to see him? How much of a say does the child's mother have in this?