I am a big sister in the Big Brothers/Big Sisters program. I live about an hour away from where the wedding will be, which is where my little sister lives too. She's almost 14, but would need an adult who is a family member to bring her. She lives with her aunt/uncle (who she doesn't get along with) with 7 other kids in the house. I know that she doesn't want to have the whole house there, and quite frankly, neither do I, but she does need to have an adult. How do I invite her? Would it be LS plus one? Or do I need to invite her/aunt. I'm just not sure what the proper way to do this would be.