The eldest son discovers his sister in her room (using a vibrator/watching adult videos/bringing her boyfriend home). Knowing her weakness, the eldest son attacks her to get revenge for the constant ridicule he receives. The second son then hears his sister's voice as she desperately resists. His relief at the thought of being saved is fleeting. The excited second son thrusts his penis into the other hole raw! The older brother's two dicks are inserted raw into the front and back holes... an extremely forbidden two-hole incest!!