A Younger Stepsister Who Only Has Sex With Me on Days That Are Divisible by 3 and on Days That Include the Number 3

March 3rd with My Stepsister, Who Only Lets Me Have Sex on Days That Are Multiples of 3 or End in 3

My stepsister, whom I gained through my parents’ remarriage, had a constitution that made her go into heat only on days that are multiples of 3 or end in 3.

I spent the night with that stepsister, and the month flew by in the blink of an eye.

The day when my stepsister goes into heat the most throughout the year— “March 3rd”—is finally here—