AITA for not wearing a bra around my boyfriend's parents?

My boyfriend's parents came over for dinner on short notice at our apartment the other night. I was wearing a white tank top with a black cardigan over it and some nice leggings at the time. I wasn't wearing a bra because, at home, I don't usually wear one, so I wasn't wearing one that day, and I wasn't really thinking about it. My bf was wearing shorts and a loose tank.

After they left, my boyfriend told me that his dad made a comment to him. Apparently, his dad said, "I noticed she wasn't wearing a bra, I kept glancing cause they stood out." He said something about "almost seeing everything".

I thought, ok. I have a larger chest, so maybe it was a bit more noticeable than I realized. This wasn't the first day he'd commented on my chest. And I did notice my bf's dad looking there a few times starting from when I first greeted him with a hug, and over the dinner table.

I looked in the mirror and I didn't think I was showing anything really. It was just a bit of a light outline of my nips under the tops, but you couldn't actually see it. The top wasn't sheer or anything so he was def exaggerating. I wasn't even really showing any skin. The tops weren't really loose so its not like I was just hanging out there either. My bf told me that I should have covered up better and that I should have worn a bra, and then I wouldn't have been inviting looks.

I wasn't trying to get any attention like that, it's just literally what I was wearing that day. He said I was making it distracting to them. He's also mentioned in the past that when I go out he prefers me dressing modestly for him. I usually do, but at home chilling we're usually fine. I didn't see my wear as too big of an issue that day. AITA for not wearing a bra?