It's your mom

-What's with all this noise sweetie?- Your mother Jessica mumbles, a tired look on her face and an equally sleepy tone in her voice, while rubbing her eyes.

-Ehm, I, well...- You begin, interrupting yourself as she squints her eyelids and covers a yawn with her hand.

-S-Sorry Mom, I thought I've seen something.- You arrange the excuse, which actually is a partial truth. But then, does this mean that Kim is not inside her? Or, and you peek in to check that he's indeed still sleeping, in Dad?

"I'm really not understanding.".

Despite the tiredness, your mom must have noticed your puzzled expression.

-Is everything alright Kim? Do you need to tell me something?-.

-Uh? Tell you... n-no, nothing at all.- But you didn't sound convincing to your own ears, let alone hers.

-Well, since I'm awake let's drink some coffee, shall we?- She proposes with a spent smile. Your mother is the type who ditches whatever she is doing if she senses something wrong in her children; once again, you're moved by her affection, but much to your shame you also feel an increasing wetness creeping between your legs. Even in that distressed state, the way her pink nightie brushes her curves, the tenderness with which she's talking to you, her obliviousness that she's not speaking with a pair woman, it's really turning you on.

That is, it's really turning Kim on.

"Oh God." You think as you fight back the thrill which is pinching your nipples: "I'm getting aroused in my sister's body!".

Though you've already masturbated inside her, this is something different: this horniness is not given by a fiscal stimulus, but by a mental one. You feel it deeper, more intimate. But you have to repress it, now it's not the time at all.

You follow her downstairs, into the kitchen, where she prepares coffee while you observe her aloof. Your eyes are captured by her swaying bubbly ass, and you can't avoid groping your breast at that lustful sight.

"Ohh... it feels good...".

-So, what's bothering you honey?- She turns around, and you quickly hide your hands.

-Nothing at all, w-why are you asking?- You play dumb. Shit, are you that bad at acting?

-Don't get it wrong, but in this period you've been...- She pauses when the pot begins to boil, and so she pours the coffee.

-I've been... what?- You press her nervously. She takes her time to resume, probably for her tiredness.

-I don't know. You seem like another person. Are you sure you're ok? Sweetie, you know that you can tell me everything, on any topic.-.

Why, what is she implying? Wait, is something going on with Kim's life that you should know about? Is she supposed to confess something at this point? What should you do then?

-Ehm, I, I mean...-.

Your interlocutor watches you fidgeting with your long hair while taking a sip, while you continue stammering and exposing yourself more and more. Fuck, you're doing everything wrong!

Suddenly, you have a convulsion, and you find yourself in a dark and humid place while squeezed by two soft pillows. Feeling once again your slimy substance, you realize that in the panic you've detached from your sister's body and you've fallen inside her panties.

You think about going back in and trying to play it better than before. On the other side, crawling away and hoping that your mom is too busy handling a confused Kim to notice you; that could be your better option.