hiding something

i can only remember one time its when my family was planning a 40th birthday party for my mom and we were planning it for a while but me my dad and my brother were keeping it a secret just fine but i almost put duct tape on my sister because everytime she saw my mom she just smiled and talked about her birthday, she almost gave it away but i think my mom already knew we were planning something because my sister but then we had the party and she acted suprised, it was good.