Curious siblings, born just a year apart, can't resist the taboo allure. The girl, a 2001 baby, teases her brother mercilessly, knowing he can't have her. But one day, she decides to give in, pulling him close and whispering, "Happy birthday, little brother." She guides his hands to her full, ripe breasts, then slips off her panties, revealing her smooth, virgin pussy. He tentatively explores her folds, then plunges in, making her gasp. She rides him, her tight, untouched cunt gripping his cock, until they both cum, sweaty and spent, their secret locked away.