AITA for telling my friend her future husband is an asshole?

I am going to a good friends wedding next weekend. I have known her since childhood and she asked me to be one of her bridesmaids. I have known her fiancé for a few years now. So last night all of us went out for dinner, and one of the groomsmen accidentally spilled some sauce on his shirt. <br>Now, he went to the bathroom to clean it and asked the bride and groom to help him get it off. They both said they were going to the bathroom but the groom told the bridesmaid to help him instead. This is where I got pissed off. He told her to help because she was a woman and it was a "woman's job". I told him to go fuck himself and so did the other bridesmaids. The groom now thinks I am an asshole for ruining his "bachelor's night" with my "feminist bullshit".