Cassie had an ongoing bet with her uncle regarding her fertility. He would fill her pussy with his cum every morning before sending her to school. If she wasn’t pregnant by the end of the year he would buy her the car she wanted. If she did get pregnant, she would instead pay for it working at his brothel.
Cassie’s secret was that a friend had told her cum needed to stay in her pussy at least an hour to make her pregnant. Cassie would stop behind bushes in a park on the way to school each morning, scoop the cum from her cunt with her hand, lick her fingers clean, and repeat until she had eaten all the cum. She smugly thought this would keep her pregnancy-free all year.
Her uncle knew about her secret, of course. He’d the one who’d paid her friend to suggest it to her…
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