Wanna know how bad her brother can get? How's this...
On our wedding night, he of course got blasted. We all did but nobody did what he did. He proceeded to finger bang one of the more promiscuous bridesmaids at the after party in our suite on the bridal bed in front of everyone (most people were so stunned, trying to act like they didn't see it) while his actual girlfriend (a nice girl) was sleeping in a room upstairs, then when he finally passed out in the room next door where my best man was sleeping, he awoke in the middle of the night and took a massive crap all over the floor in the closet which I had to clean up, and of course, he playfully denies it to this day and acts like it's a big joke.
If he ever gets to AA, somebody needs to tell him he owes me and my wife (his sister) an apology for that.