Is it appropriate for a guest to clean my bathroom?

My husband’s son brings his young daughters to visit our house once a week or so. He begins every visit by taking out his Clorox wipes and cleaning my bathroom. He wipes down the toilet, the counter and the sink. He does this quite openly and even leaves the pack of wipes on the counter when he is finished. I am not the best organized person in the world, but I do clean the bathroom very well on the regular. I find it incredibly insulting that my bathroom isn’t clean enough for him and his children and do not believe it is appropriate for him to do this. My husband says it’s ok because he has little girls who use that bathroom. Am I wrong to be offended?

Side Note: I have visited his home and it was quite a mess, with food, trash, and toys strewn throughout.