Hi, I need some help quickly.
I just moved back for family two days ago from several states away and had made prior arrangements to look at a wedding reception venue. My fiance is coming and I extended the invite to my parents and MOH (sister). They all agreed to come and we are going to visit the venue tomorrow.
I picked up my sister and a couple of her friends from a concert and they are all intoxicated. They are crashing at the house tonight. To my shock, she brought up plans for tomorrow in front of her friends and suggested that she plans to bring them along. I have JUST met one of these people tonight, and the other friend the second time. I have no plans to invite them to my wedding because I really don't know them ell and I am extremely tight on budget. I do not want to include them to look at a wedding reception venue and give them the impression they would be invited to my wedding. I quietly mentioned to my sister that this was a family only event and to not invite her friends with us. She seemed to have ignored me.
I am hoping this is just her being intoxicated... but how should I approach this if she REALLY does bring her friends along? She's saying the whole family AND her friends go out for breakfast and then look at the wedding venue. I want this to be a family only event and not bring people over who are A) not contributing to the wedding and

are not invited. I really don't want to deal with drama the following day after I just moved from a 12 hour trip. Thanks.