Step-Mommy found your BIG dirty secret. Her panties are SOAKED with cum....but she's jumped to the wrong conclusion. You have always had really big loads, but she thinks you're addicted to masturbating- not that you came just one time and covered all those panties. She's pretty upset and think you're lying to her! You're shocked when she tells you to prove it. She's shocked when you whip it out and it's BIG. Consider her tantalized. It seems she's not so angry the more you're jerking off in front of her. She warms up to the idea of helping by getting out her big tits and even offers you a tit-fuck. She wraps her panties around your cock and she thinks she's finally caught you in your lie when you cum....but she is VERY wrong. step-Mommy owes you an apology!