Another visitor. Mom enters the room

After a few more soft thrusts, your dad sighed contently and eventually rolled off to your side, leaving you to wince and stare down at your womanhood. The flesh was even more red now, but at least you were spared to sight of your father's cum. He must've dumped his load deep in.

Unfortunately you weren't granted much of a chance to recover, since the bedroom door opened and none other than your mother stepped in! Shit, this will get ugly. However, she didn't immediately start shouting upon seeing you on your back, freshly fucked and with her husband by your side.

"Good morning you two," she announced... quite happily? "I just heard you finishing so I figured it's a good time to come by." She didn't seem angry at all. Upon noticing your confused expression, she approaches your side of the bed. "Don't worry about it Sarah, we're in an open relationship! It's all good." Her way of talking was pretty welcoming, and motherly. Good, seems like you avoided breaking the family peace even after spreading your legs for daddy. "I'm uh, glad to hear."

"Let me help you out there so you don't make a mess." You're not sure what she means as she leans over to you with some small rubber dome between her fingers, and before you could react, she lowered it down to your gaping vagina and pushed it right on inside. You gasp immediately, and give her another confused stare.

"Surely you know those? It's a diaphragm... well usually it's used as birth control, but we can also use it to make sure you don't dribble semen all over my furniture at the breakfast table," she explains, and you feel her scraping it along your fleshy insides to gather every drop of your dad's potent sperm with the device before she lodges it in place around your cervix with an airtight, uncomfortable seal. "I've heard that you're on the pill, so you don't have to worry about getting preggers. Lucky gal!"

"T-thanks," you stutter nervously. She had good intentions, but having living semen stuck inside of you? That's the last thing you needed. Whoever gave them the idea that you are on the pill anyway? Gwen must've tried to make it more believable that you are really just one of Jimmy's friends.

Before you could say anything more, she already took one of your old boxer shorts out of the wardrobe and slid them up your legs, further blocking access at your own genitals. As she pulls the shorts completely up and into place around your crotch, you glance towards the nightstand again. Still forty minutes before you change back, except now there was a whole river of potent little swimmers wriggling their way through your tiny, nubile cervix with a diaphragm to secure them in place, while your shorts prevented you from taking care of it in a subtle manner. From what you remember of your biology lessons, this wasn't a good situation. This is how girls get pregnant.