On Tuesday when I came back from school,went straight to my room to change but I noticed the door was open and i decided to check on my brother,I knocked on his room door and there was no response,instead I was hearing a sound coming from my parents room .... Only for me to open the door and saw my brother having s§x with my step mother!!!! My mother died four years ago and my father re-married this useless woman a year after my mother passed. I could not believe my eyes!!!! they both begged me not to tell my dad,I have been sad and very confused, I really feel pity for my dad,now I don't know if I should tell him or keep it to myself since they said that was their first time and they promised not to do it again, and I know my father may disown my brother and divorce his wife,and that can scatter my family for life,since it was only the two of us my mother gave birth to before she passed. My step mother has been really kind and quiet and I feel she is already feeling sorry about her action but I don't know if I should tell or keep it to myself, I wish I never saw them,I wish my mother never died,i wish delayed in school before coming back.....