When the nurse sister came home after 10 consecutive night shifts, she seemed to have had a really tough time with this abstinence life, so she went crazy and forcibly inserted her dick into me, even if I was her younger brother! She transformed into a ferocious sex beast! My usually kind and serious sister, without caring about me at all, pushes me down, drags me around, forgets herself, and cums like crazy with intense piston thrusts! Even if I say "Wait a minute!", my sister forcibly sucks on my dick! There's nothing I can do anymore. Until my sister cums and is satisfied.