Humanity faces extinction from a mysterious and massive fertility problem. The key to babies is a lot of men doing a woman during her brief fertile period. Women have to get it from 40 different guys in the middle of the month. And the guys have to save their seed for just that occasion.
Genre: Erotica
Tags: Ma/Fa, Ma/ft, mt/Fa, Consensual, Reluctant, Coercion, Heterosexual, Science Fiction, Spanking, First, Oral Sex
Sex Contents: Much Sex
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