My Black Babies Ch. 10 - Sex Stories

My Black Babies Ch. 10

... she'll need to put the large plug in every other day for at least eight hours to keep her asshole limber for a good ass fucking. Jackie, what day did your last period start?"

"Last Tuesday."

"So starting this Tuesday, Frank needs to be in his cage any time that he's at home. If you wish to take it off him before he goes to work, that's fine, but when he's home, he's in it. That will continue for ten days, at which time it can come off again. He can start fucking your pussy again, but will have to use a condom every time."

"Why so many days?" Frank asked.

"Other than the fact your wife is on the rag when she has her period, do you know much about women's ovulation cycles?"

"Can't say I do."

"The cycle is usually 28 days long, generally, a lunar month, but it can vary from 21 days to 39 days with different people, or even how consistent a particular woman's cycle is. Given a 28 day cycle, a woman's ovaries generally release one egg, 14 days after her period starts. Generally, eggs become fertilized before they reach the womb. If an egg is fertilized, it sticks to the womb walls, to the mucus that begins building up before her egg drops. Male sperm can live in female reproductive organs for 3-5 days, so any unprotected sex five days before ovulation is a risk to a fertile female. Her egg only has 12-24 hours to live if it's not fertilized, and will pass out of her body. Her period is when her womb begins shedding all the preparatory work it did to receive an ...

... egg.

"After the age of forty, Jackie's periods probably became more irregular. Birth control pills help maintain regularity, but if she's going off them, it becomes more difficult to tell when she's getting close to ovulating. It might also change with her exercise regimen, which I'm asking her to do. Her start date may change for her next period. In order to do this show thing, we need to make sure she can have a baby by being fertile, and making sure it can only be a black male. It's more difficult for women her age to have babies, but not impossible. Personally, due to the uncertainty of her ovulation, I'd have you in chastity permanently until the show, but we'll make the assumption that if you're condom covered the rest of the time, you won't get her pregnant by accident. My only worry is you waking up with morning wood, cuddling a little too close before you wake up. Perhaps we could make that less likely by locking you up every night, but that's the reason."

"Okay. I guess that makes sense."

"While you're locked up, the only sex you're getting with Jackie is to lick her, and use her black dildos on her, and playing with her plugs. That's it. If you get a strap-on harness that uses the Vac-U-Loc system like she bought, you can be having sex in all your normal ways, except you'll be using her black dildos to fuck her instead of your white dick, getting her used to larger, more intimidating cocks. She won't be fucking small black dicks, only ones seven inches and ...