Husband hit 8 month old son.

This just happened. I'm still shaking and have no idea what to do.My husband works night so sometimes during the day he'll go down for a nap with our son. Our boy is a horrible sleeper so it helps when someone falls asleep with him. This is so much easier for my husband to do as he doesn't have those sensitive mama ears. I was in the kitchen with our daughter (4) baking cookies when I could hear our son had woken up, so I opened the door to wake my husband and get the baby to stop fussing. Baby starts to get more frustrated as dads not waking up so I yell for husband to wake up. Baby still fussing a few minutes later so I lean over our kitchen island to look and there is my husband slapping our son twice in the side of the head. I see RED. YELL. Grab our son and start crying hysterically. He starts trying to make excuses. But stops and says he knows it's not okay. I rely on him so much - I don't think I can anymore.My husband looks after our son and daughter 2 days a week alone while I'm at work for a few hours. I don't know what I'm going to do. via /r/Parenting http://bit.ly/2K0EzO2