Would you take this offensive?

So I work with one girl and the rest are guys. Only one of the guys cleans and us two girls clean. There was something on the floor as I was helping a customer out I overheard the two guys discussing about how something is on the floor and my boss was like “I’ll make her do it in a second” while I was already doing something and they weren’t. I found it offensive as to why the other guy employee couldn’t do it while I was helping a customer. But maybe I’m just being a drama queen.