After getting engaged, I knew pretty much immediately who all I wanted to be my bridesmaids: my sister, his sister, 3 grad school friends, and 2 high school friends, all of whom I'm very close to. However, my brother has a long term girlfriend, who my family and I all genuinely like a lot. I started thinking it would be really nice/fun to have her as a bridesmaid too. The thing is, although they've been together for 3 years, they won't be getting married any time soon because my brother is in medical school. When I broached the topic with him, he said she would love that and that he didn't feel as though it'd put any pressure on him. I personally wouldn't think twice about asking her if they were engaged, so to me this seems fairly similar. Upon telling my parents about it though, they were both fairly shocked and acted as though you couldn't really do that unless they were engaged/married in the event they break up and I just end up having my brother's ex in my pictures. Thoughts?