You don't know exactly why your sister and her boyfriend thought it would still be a good idea to go camping after to polar vortex hit. Sure, YOU had the equipment, but if those two lovebirds did not watch out, they could freeze to death...
. ..Which may just happen, Since your sister is naked outside of your tent in -20 F. Before she could say a word, you bring her in, and begin the counter the effects of hypothermia. As you climb in naked into the sleeping bag, you cuddle close so she can grab heat and ask her what the FUCK is going on.
So she tells you, and she tells you everything, including the reason for the trip. It takes a while since she needs to take breaks to warm up. She wanted to move to the next level with her boyfriend, but not just marriage. She wanted to start a family, and him to know when that happened. So, she planned this trip so that her cycle would line up with the "We're in the middle of the woods, lets be loud" sex. She made sure that all the protection was left home, nothing could be improvised. She took some Ovulaid before she left, so her fertility would kick into overdrive, and began masturbating before he got back, so that she would be open and ready to be pounded. She kind of got lost in the fantasy, plating with her tits, imagining a she was feeding a child, while her boyfriend fuck another into her. That one really turned her on.
He on the other hand did not. He, being the idiot that you told her he always was, threw her out once he found out what was going on. Colapsed the tent and left. She did not even have time to wipe the juices from her pussy off from between her legs.
Speaking of juices, you not that your dick is covered in pussy juice, and that it is harder that you have ever felt before. All this baby talk is making you horny. Neither of you spoke as you moved closer, and connected as society said siblings never should. She was frigid, but she was warming up in your arms. The multiple loads of cum that you shot into hungry and over fertile pussy helped a lot too. You did not know what the future held for both of you, but you knew that kinky sex was very much in it. You wonder if she will be a breasmilk slut too...only one way to find out!
