Mommies, hello everyone! We're living together with our parents right …

Mommies, hello everyone! We're living together with our parents right now. We have two daughters and each of us has a child. One is older by half a year (1.10) my younger one (1.3). And here's the thing: the older child constantly bothers my younger one. It all started with bites when he was a year old. He bit very painfully, leaving marks. And only him. We thought it would grow out, but time goes on worse, punches, hits with fists, pinches, now epic scratches. I reacted normally at first, meaning I understand that the child doesn't understand yet, but now he's almost two years old and he understands everything. He doesn