My heart races as I'm caught red-handed, my cock throbbing in my fist, the visual novel's animations playing out on the screen behind me. My stepmom's friend, a voluptuous woman with a kinky glint in her eye, seems amused rather than shocked. She steps closer, her voice a sultry whisper, "You like big tits, huh? Let me help you with that." She unbuttons her blouse, revealing a lacy bra struggling to contain her massive breasts. I'm speechless, my hand still working my cock as she reaches out, gently pushing my hand aside.