In an adult role-play, Marin is my serious, high-achieving childhood friend and one year older than me. When I admit that I have become curious about BDSM, she agrees to try it together. We begin with cotton-rope bondage, and once she is restrained in an embarrassing pose, her wet panties reveal how excited she is. A brush makes her juices flow even more, so I shove my cock into her mouth and experiment with rough deep-throat play. She looks distressed, but she also seems to enjoy the domination. Realizing that her masochistic side has awakened—and that I may have a talent for control—I decide to train her as my obedient masochist pet.