POST-227 Big brother's cock is 18cm! I Showed My Little Sister's 18cm Cock To My Sister's Friend Who Came To Stay! "Sorry! I was here to stay!" "Eh! How big am I?!"

My younger sister often brings her friends from school to stay overnight, so I pretended not to know when my friend took a bath and got a full erection and entered the bathroom! Surprise friends! I feel the gaze on the big cock! Well then what?