Different parenting styles?

My husband and I have ALWAYS been on the same page, so I’m at a loss on what to do.

I made it very very clear we would NOT be spanking our child. He agreed, and we looked into other parenting options and what ages were appropriate for what disciplinary action, etc. and agreed on what we thought was best.

she’s 9 months old. At this age, there is nothing to discipline. She’s too young to understand what discipline is. We teach her and tell her no no, and redirect her.

I work nights at home, and my husband keeps an eye on her upstairs. Well, I heard her crying for a while, so I went up to see if he needed help, and he was spanking her for crying! Keep in mind, it’s 10 pm so she’s tired and probably hungry (she’s breastfed), so it’s understandable that she’s crying. And I know he was tired too (he had been up since 4 AM) but I just can’t believe he took it out on her. He didn’t hit hard at all, but it still shocked me.

He’s not an angry person usually, he’s very sweet and loving, and he’s a good daddy. We had a conversation about how it was NOT acceptable and how he broke both of our trust. But now I don’t know how to feel comfortable leaving her with him again.

Any advice?