My family is a bit dysfunctional. I have three stepbrothers and one step sister. I'm incredibly close to my step sister and ONE of my step brothers. The other two and I get along just fine and I am blessed to have them in my life, but we aren't super close. My fiancé and I would like to ask my step sister and youngest step brother to be members of our wedding party. Is it okay to do this and not ask the other two step brothers? I honestly don't think they'll be offended or care, but it still worries me!