My girlfriend is an underground idol, so she won't allow unprotected sex due to her restrictions. Despite our long relationship, she's always refused to let me creampie her, holding firm on that rule. I was deeply in love with her and fantasized about the day she'd finally let me fuck her raw. That's when her older sister appeared, flashing her big tits and tempting me by saying creampie was okay. Even though I loved my girlfriend, I couldn't resist that temptation. I indulged in her sister's huge breasts and fucked her relentlessly, eventually getting caught by my girlfriend. But I couldn't stop—instead, I kept going and unloaded massive creampie after creampie into her big-titted sister.