Tell Millie the truth
From Torg Adventure
You decide that honesty is best, especially since she doesn't seem squicked out by it. You clear your throat. "Well, since you ask, yes, Tracy and I had sex this morning in my bunk bed."
"Why?" Millie looks curious, not disgusted.
"Several reasons, Millie. First off, we've been crammed down here for weeks, and we were both just completely horny. Secondly, the five of us are all we've got. Until we find outsiders, the only people right now are us. Everything has changed and society is gone. We might be the only people in a thousand miles still alive. We have our survival as a species to think about. So, part of the reason Tracy and I fucked was to get her pregnant, to help repopulate. And last, she's my sister and I love her. Making love helps make the death and destruction go away for a little while. I fucked Mom yesterday, too. We were in the storage room, taking inventory, and the next thing you know, I'm taking inventory of her pussy. Dad wants me to try to get all of you knocked up. He can't cause he's impotent and sterile."
"Really? He wants you to fuck me too?" she asks with a certain lilt in her voice that you can't quite place. Is she interested?
"Yes, we had a talk yesterday before Mom and I did inventory. He's worried about survival of the human race. I'm very happy to help, but mostly I'm incredibly horny all the time, and you three are the only sex partners available," you say. "Anyway, what have you been doing to stay sane?"
Millie smirks and blushes, unexpectedly. She clears her throat. "Oh, I've been reading erotica. Well, porn really. Most of my books are cleverly disguised porn. Then I jill like crazy at night."
You look at her in shock. "You, Millie? Porn? You're so sweet and innocent!" you exclaim incredulously.
"Yeah, I know, who'd a thunk it?" she says with a grin. Your little sister gets thoughtful look on her face -- those gears in her head are moving rapidly. Then she looks you straight in the eye, grinding her belly on your cock, making you groan. "I'm tired of playing with myself. I want to join in the fun. Fuck me and I'll let you read my books. I've got some hot stuff. Bondage, submission, whips, Nazis, group sex, gay, lez, bi. Even incest and knocked up stories. What do you say?" She has a mischievous look on her face, and she's biting her lip.
"How about we start right now?" you ask, eager to fuck another sister.
"I've got a better idea. We have a houseful of beds in there," she says, tilting her head toward your house. "And I have some toys I could bring with. Maybe you can help me smuggle them into the shelter."
You grab her head and lean up to kiss her. She shifts and rubs her clothed mound on your cock as she thrusts her tongue past your lips. You fall into the kiss and make out with Millie for five minutes, before you break off and she gets up. Millie gives you a hand up and you walk to the house arm in arm.
What next?
