Weddingbee boards

so i wanted to keep my ceremony very very simple.  we are not doing any special songs just the piano.  the piano player will play whatever while people are sitting down,  i havent picked the parents entrance song yet, then the BMs will walk in to Canon in D, and i will walk in to the wedding march.  we will not do a unity candle a reading or a singing during the cermony.  then we will exit to the da do dada dun dum dum(you know the married song) well my FMIL thinks that we need 1 song between when the mothers are seated and before the girls walk in.  so i have to have one song on a cd and have one person push play and push stop.  that to me is just another thing to worry about and i dont think we need it. but for some weird reason she's really pushing it.  i need to put a good fight with a good reason why we dont need this.  any suggestions?  by the way i really love my FMIL so no harshness please