I'm really stuck on whether or not it is a good idea to invite my cousin to my wedding. She has been struggling with a drug addiction for the last few years, and frequently steals from family members at family events (like Christmas or birthdays) and engages in erratic behavior. We aren't especially close, but we did grow up together and our families are very close. She's in rehab now, so I am holding out hope that she'll be able to overcome the addiction ,but I am worried about inviting her. I am also inviting the other members of her family, who I am close to, and I don't want to make her feel isolated from the family due to her addiction. I don't want to exclude her, but at the same time I want to protect my other guests and the venue (and I guess myself) from any theft, vandalism, or drug use. Also, her partner is her drug supplier and I worry about her bringing him regardless of whether or not I invite her with a guest....