My extremely kind and timid stepsister is always considerate toward me. “Surely some teasing is okay?” I thought, poking her nipples… Safe! Maybe I can go further!? Daily nipple play escalated until her reluctant expression turned pleasure-filled! “This means yes!” I touched everywhere and eventually had sex with her! What started as playful nipple teasing unexpectedly developed her nipples! Now just lightly touching them makes her lower body tremble with sensitivity!