1 MOH no bridesmaids for my wedding?

My fiance and I decided to just have my older sister and his younger brother as the Maid of Honor and Best Man at our wedding. We also have a Ring Bearer and a Flower Girl. I'm wondering if the time it takes everyone to walk down the aisle will seem to short or not since there will only be 3 pairs of us walking in lol. We picked our song and it's about 4 minutes and 30 seconds long...I highly doubt it will take everyone that long! Is it weird since the song will be cut short?