The majority of the time, the first dance will be followed directly by the father/daughter dance, and then the mother/son. Pay close attention to the length of song when you're choosing songs for these dances, especially if you or your parents are not particularly in love with the limelight. Remember, you've just been the center of attention for a full dance already. I've known more than one or two newlyweds who ended up, halfway through their parents' song, looking around uncomfortably before signaling to fade the song out. This may not be you, but if you think it might be, you should think about picking a short song or giving the DJ permission ahead of time to fade out early. Keep in mind that some songs have very wedding specific verses later in the selection. You may have heard the song, Butterfly Kisses. This is a good example. The song is over five minutes long, and there's a verse toward the end that starts, "She'll change her name, today,"--kind of important to the meaning involved in picking it as your father/daughter dance! You can't really fade out early in that situation. Another way to handle this is to combine the mother/son with the father/daughter. This way one song covers your bases. In the end it may not matter, depending how comfortable you are in front of an audience, but it's a good thing to give some consideration to beforehand.