Boys kept trying to look up my skirt

I work as a caterer and was catering to this wedding. It was a small wedding. I don't wear pants. I wear either long skirts or dresses. I had on a chef's shirt with a long skirt. There were these boys between the ages of 8 and 10 who would keep going up behind me and trying to lift up my skirt and they would laugh and run away. I asked them nicely to plz stop and by the 5th time theyve done it I spoke to the bride and she said "Oh they're just being boys. You know how boys are." I didn't know what else to say so I went back to what I was doing and the next time they did it they almost pulled my skirt all the way down and I got a big louder and "Plz stop touching me." The brides older son, probably high school aged yelled at his younger brother and said "Aaron! Cut the shit anf leave her tf alone!" Then the bride smacked him across the face and told him to watch his mouth and never speak to his brother like that again and he's supposed to be the role model. So I at least know one of the little boys doing it was the brides son and she did nothing about it. In fact as she paid me she told me to maybe not wear skirts anymore.