So I recently had a baby boy. He is about to turn two months. His daddy has a daughter from a previous marriage. Sometimes when he holds the baby, he puts him upside down and holds him by his feet. I find this cruel and can hurt the baby. I'm about to not let him hold the baby at all. He says I'm overreacting, he says he did that to his daughter and she turned out fine. So am I overreacting or am I right to not let him hold him

Update: I took are son to the doctor his fine. I told my fiance that I was gonna tell the pediatrician. I got scared and said they could consider it child in dangerment and agreed only to do it when I said it was ok