Complex sentence: Ruth and her sisters Anita, Bonnie and June alongside their three brothers were not allowed to listen to secular music by their parents though when they were gone the sisters often would sing in front of family to secular music.
Split into simpler sentences: Ruth and her sisters Anita, Bonnie and June alongside their three brothers were not allowed to listen to secular music by their parents though when they were gone. The sisters often would sing in front of family to secular music.