One day, my plain sister brought a friend from school home for the first time... However, the friend was a girl who was bullying my sister. When I went to my sister's room, I was forced to have sex with her friend for fun and lost my virginity! I was forced to have sex with her other friends one after another... I was like a sex toy. My sister's friend, who was in a bad mood, said he wanted to see my sister and I having sex... My sister and I resisted, but we couldn't resist and were forced to insert our penises... In the end, I was forced to have the forbidden creampie in the worst incest! Something went wrong in me...