AITA for asking my friend’s gf how old she was when she made that ceramic?

This happened a few days ago and I wanted to get some opinions. My friend who I’ll call Marcus’ gf, Sarah invited me and a couple more friends to dinner as a way of getting to know one another. Marcus had told us before that Sarah has been interested in ceramics since she was a kid and there were a lot of them displayed in her home. Now here I want to just say that I had no malicious intent when I asked this question and I just wanted to show that I was interested in getting to know her as she seemed like a genuinely nice person.

So, I saw a little ceramic pot in the living room and asked her how old she was when she made that one as I also participated in the ceramics club when I was a kid and it reminded me of a similar one I made which I still keep in my house. When I asked the question I could see on her face that she got upset and she told me that she made it a couple of weeks ago. I immediately tried to explain myself saying that I didn’t mean it was bad or anything and told her about my own little pot I made but I could see that it wasn’t really helping. Marcus gave me a look and then changed the subject but I could sense that she was a bit more distant towards me throughout the day.

After we left Marcus called me to berate me while I tried to explain everything again. He is still angry with me for everything and though I feel bad about my comment, I didn’t mean anything bad by it. So what do you think? AITA?