His girlfriend insists on condoms and never allows bare sex, despite their serious relationship. Starved for the feeling of raw penetration, he is approached by her voluptuous adult older sister, who flaunts her huge breasts and promises he can creampie her. He loves his girlfriend but cannot resist the thrill and taboo of her sister’s offer. Even when his girlfriend finally catches them after repeated secret encounters, the sex feels too good to stop, and he finishes by creampieing her sister again.