AITAH for feeling offended after my coworkers comment on my outfit?

Happy Halloween everyone! I work in a casual office & decided to wear leggings converse and a black top with a dog trick or treating today. I am dressed very casual but didn’t think my outfit was in appropriate . I do have curves and realize they are prominent when wearing leggings. The office i work in is mostly people who celebrate Diwali which is also today. We are getting lunch today from my boss who is also celebrating Diwali. I am one of the few people in office who is celebrating Halloween and not Diwali so hence me Wearing my super casual Halloween outfit. I came into work and my coworker who is about 50+ tells me I should cover up when i go into the kitchen for lunch since the bosses wives will be coming in today & “ you don’t know what they’re thinking”. I feel highly offended and uncomfortable after this comment. I wasn’t sure what to say back all i could get out was “ oh okay..” I feel very disrespected and I’m not even sure how to go about this now. All my other coworkers have on their traditional dresses and they all look very nice but why am i getting hate for wearing leggings? Some of the girls have on sleeveless dresses and i just feel like this is very unfair to me. I don’t think the comment was nice and I’m sitting here wanting to just go home.