I accidentally saw my 22 year old sons cock. He was masturbating with his door open slightly. I was in the hallway and it was dark. I stayed and watched and actually saw him cum. I can't stop thinking about it. I feel guilty because I am now masturbating thinking about it. His cock is large and I honestly don't think I ever saw that much cum. My thoughts have gone where no mothers should go. This past week, I masturbated about him jerking off in front of my face. I'm concerned where my thoughts might lead.