"Jill and Tom have been a couple for a few months, and things have been getting hot and heavy. They decide on a form of birth control that they get from a "shaman". It is supposed to be one hundred percent effective "mystic" birth control.
They find it is indeed very effective. With the change in her panties, there's no way she can get pregnant. The two of them engage in some risk free sex, and have fun with her new equipment.

Contains futa on male sex."
for sale on kindle, free on kindle unlimited.
excerpt and link to buy on here on my blog.