AITA for letting my mom rub whiskey on my babies gums?

I 28f am a first time mom. My husband and I have a 6 month old baby who is teething horribly. I was at my mothers home a few days ago and was speaking to her about the teething issues. My mom does some old fashion things and she’s really into herbs and natural healing and such, so she wanted to try rubbing whiskey on my daughters gums. She said she did it to me and all 3 of my siblings. I let her, and it did seem to calm my daughter down a bit.

When I got home I told my husband about this, and he was furious. He said that’s harmful to our daughter and it does not relieve any pain. He got really upset and said I shouldn’t of let my mom do something like that, and told me I couldn’t bring our daughter to my mothers anymore.

He’s since called the next 2 days off of work, and is super paranoid watching me every second with our daughter. I feel this is unfair.