My relationship with my girlfriend has been long, but she always insists on using condoms during sex. Her refusal to let me creampie her has been a constant test of my patience. Despite being together for so long, she still won't allow bareback sex, and my frustration keeps building. Then, her older sister appeared—flaunting her big tits and openly offering creampie sex. Though I love my girlfriend, when the sister touches me with those massive breasts and aggressively seduces me, I can't resist. Drenched in her squirting fluids, I'm overwhelmed by thrill and guilt, yet my erection won't subside. Eventually, my girlfriend finds out—but upon learning I can have creampie sex with her sister, she allows it, giving me the green light to continue.