I asked my step sister, who I am not really close to, to be in my wedding. We were really close when we were kids but that was because I was at my dad's house every other weekend. Now that we are both in our mid 20's our relationship is bare minimal. At first when I asked her she was very excited and we talked atleast once a week. I have emailed all of my bridesmaid atleast once a month just to give them updates and to remind them to order their dress. Well I have always received a response back from everyone but her. I have also tried to call her, text her, email her and facebook her as well, and still no response. I talked to my dad the other night and asked him if she was still planning on being in the wedding and he said yes she was but she has just been "really busy" lately. Well, I mean so have I to with planning a wedding but I still find time to email and keep in contact with my bridesmaids. I am wondering how I can ask her if she is still wanting to be in my wedding or not. What is the best way to address this?