AITA for telling my cousin that she was showing too much skin?

Last summer, my cousin Naomi (at-that-time 19) and her parents were visiting my parents for the weekend. I (at-that-time 27M) happened to come home on the Saturday while my cousin was there too. That afternoon, I walked into the visitor's bedroom to chill with Naomi, and I saw that she was lying down on the bed, facing the door, just surfing the web on her phone. She was wearing a very revealing tank top and basketball shorts, and I could see her bra and basically her entire body through her top. So I immediately noped out of the bedroom. She asked me what was wrong, so I came back inside, and discreetly told her that I could see too much skin. She looked at me, visibly weirded out, and told me "dude, it's just skin". I replied back to her, and things escalated a bit mildly. I ended up simply leaving her room, and while I was leaving, Naomi threw a pillow at the door.

Later on, we were called down for dinner. Naomi came down, and I could tell that she had been crying. However, she was apparently feeling fine enough to remain dressed in her offending tank top and shorts. When her parents and my parents asked her what was wrong, she just brushed it off and didn't tell them about our awkward encounter. Naomi and I still have not made up by now, and when I messaged her on Christmas day saying "Merry Christmas!" she replied back, telling me to just leave her alone.

Aita?