Telling the truth

Date: 2/10/2017

Basically, Me, my sister, my brother and my Dad were at a water park. I was annoyed with my dad and he asked me what was wrong, i said "nothing" but my sister told him it was a lie, so I started telling him the truth (usually I always lie to him because we don't have the best relationship) then he walked off and they all went down the water slides apart from me.