Your girlfriend in her new underwear

Katie has stripped off her dress and, for the first time, you get to see her in your gift. Her body looks just as sexy as you hoped. Unfortunately, the look on her face is a different story. Tear stained and horror stricken, there is clearly something very wrong.

“I can't get it off.” She whimpers. You stare at her, dumbfounded. “The underwear won't come off! It's stuck to me. And there's something inside me. It's getting bigger.”

You walk over, scowling. It won't come off? That's not possible. As is this talk about something inside her.

And yet, as you touch the straps of her bra, you realize she's right. The material is stuck to her skin. You try to dig your fingernails underneath, searching for a gap to pry it away, but she cries out in pain.

“OW! Sonofabitch that hurts.” She groans. “I already tried that. It's so weird. It's like it's part of me. I can even feel things through it. Like it's become my skin or something.” Suddenly, she sucks in a breath and collapses against the wall.

“What's wrong?” You ask, grabbing hold of her to keep her from falling further.

“It's growing again.” She gasps. “The thing inside me. It's so big now.”

“I don't understand. What is it?”

She shakes her head, just as confused as you are. The look on her face is still tense and fearful, but it's clear there's something more going on. Something intense. Maybe even something pleasurable.

“It's like a big, fat cock, moving around inside me.” She finally moans, giving into whatever sensations she feeling. “I think it's alive.”

“There's something alive inside your panties?” You repeat in disbelief.

She shakes her head, growing surprisingly calm. “I think the panties are alive. The bra too. I can feel them touching me. Massaging my nipples. Rubbing at my clit. It's kinda nice, when you get used to it.”

As your girlfriend's panic melts away, yours only rises. She's being violated. Which, in an odd way, feels like you are being violated. That pussy with a “big, fat cock” inside it is for your cock only. Desperately, you begin clawing at her panties, trying to find a way to take them off.

“Shhh...” Katie takes hold of your hand and guides it away from the waistband, down between her legs. Her mound is soft and warm under your fingers, the strange material formed tightly to her pussy. Tightly enough that you can feel the outline of her lips stretched wide around an unseen entity. She moans as you touch her, clutching your shoulders as your fingers glide over the second skin.

“Yes. Touch me. I can feel it. All of it.” You press against the base of the invader plumbing her depths, and are shocked at what you feel. It shifts spastically under your fingertips, not separately from the panties, but as a part of them.

“OH! Oh... it's ok...” She gasps, then giggles. “He's nice.” You realize she's not talking to you, but to the creature inside her. Soothing it after it reacted to your touch.

You look at her in bewilderment. “I don't know what to do,” you say helplessly.

“Just kiss me.” She moans, pulling you close. She devours your mouth in absolute passion, grinding her body against yours. Her hands soon find their way to your belt and set to work unfastening your pants as you make out. When your cock finally springs free it is stiff and eager for whatever she has in mind. She draws her lips to your ear, her voice low and sultry.

“I think I'm going to be a bad girl and have my dessert before dinner.” A moment later, she slips down to her knees and takes you into your mouth.

Your head is absolutely spinning as she sucks you. You want to enjoy it. To relax into quite possibly the best fellatio of your life. But then she moans into your cock again and you know it's because of that thing inside her. Pleasuring her and driving her to pleasure you.

You can't help but feel a pang of jealousy, but then feel silly for doing so. Whatever it is, you're not competing with it, any more than you're competing with the vibrator you know she keeps tucked in her nightstand.

She moans more loudly, threatening to draw attention to the bathroom that has, thankfully, remained otherwise unoccupied thus far. “OH! Oh fuck!” She gasps, pulling her mouth off of you in response to the intensity of whatever she is feeling. She continues to jack you off with one hand, as with the other she grabs onto your leg tightly.

“What's going on?” You ask, growing more and more curious about what your girlfriend is experiencing.

“I think... it's learning.” She pants. “It just keeps getting better. Oh god! OH GOD!” She makes a face you know well. The face of a powerful orgasm washing over her. It's one of the sexiest things you've ever seen. When it finally passes, she looks up at you with an expression of intense, burning lust.

“Your turn.” Devouring your cock with renewed passion, she holds nothing back as she swallows it deeper than you knew she was capable. Bobbing on it with manic ferocity. One hand gripping the base, urging you on, while the other fondles your balls in a delightful manner. It doesn't take long for her actions to have their desired effect.