So my brother and sister-in-law were unable to have their first dance, due to a silly rule that the church came up with right before they got married. I want to surprise them and have them have their first dance at my reception after my FI and I have ours. I need to figure out song I should play for them. How should i go about asking him or her with out buntly saying "what would ya'll had as first dance song?" any advice??