Jeongin is her little brother and he is 4 y’all have 4 year old gap(She is 8 and she has a boyfriend)

Today she was in her room playing a game on her phone then she heard grunting from her little brother’s room

She was kinda of confused so she got up to go to her little brother room,then she peeked thru the keyhole and saw him fucking a empty ketchup bottle