The Kiss That Set Mariana and Her Stepsister on Fire

It all started with an unexpected visit. Some relatives came to stay for a few days, and to make room for them, Mariana’s bedroom was taken. Until they left, she would have to share a room with Sofía, her stepsister. Far from bothering them, the idea put them in a good mood: they had always been more like accomplices than sisters.

The two of them shared everything. They had the same body, almost the same size, and they lent each other clothes without asking permission. They spent hours talking about anything, going over the gossip of the day, old memories, the plans that didn’t exist yet. They could stretch a conversation to the very last detail, like two chatterboxes who would lose their voices before they ran out of things to say.

That week, they had also been invited to a party. And if there was something they loved as much as talking, it was going out. They had a knack for being liked, for making friends anywhere, and they knew that at that gathering they would finally meet a certain group of popular people they had wanted to get to know for some time. They waited for the day with an excitement they made no attempt to hide.

The afternoon of the party was pure commotion. They tried on half a dozen dresses each, sized up one, then another, discarded them, started over. When they finally came out, both looked splendid, and they did not go unnoticed: more than one gaze stuck to them the moment they crossed the door.

They were introduced to the group they had been so interested in, and thanks to how easily they could chat, they were welcomed as if they had been part of the circle forever. They danced, drank, talked until night turned into dawn. Everyone wanted to know about them, ask them things, steal a little of their attention.

Very late, someone suggested one of those spicy games the group liked to play when they were comfortable with one another. Mariana and Sofía were invited to join, which they took as a sign that they had truly been accepted.

The game was the usual one: kisses back and forth, one less piece of clothing here, another there, until almost everyone was in their underwear. Nothing they hadn’t done before. Until Mariana was given a different punishment: she had to kiss another girl, and the rule said the kiss had to be real, with desire, no timid brushing of lips.

She blushed. Kissing boys had not embarrassed her, but this was something else. She had never kissed a woman. She was nervous, her cheeks burning, but she didn’t want to back out.

And what a kiss it was. Tongue, no restraint, long. As the seconds passed, Mariana’s nerves turned into something else. Those lips were soft, unlike any she knew; the other girl’s hands traveled over her back and made her skin prickle. Because the kiss went on so long, she had time to feel every detail, to realize that something new had lit up inside her. When they pulled apart, the only thing she wanted was to kiss her again. But the game went on, and she was left aching with want.

***

They got home drunk and slipped into the bedroom without making a sound. They took off their dresses and ended up in their underwear, which was how both of them slept. They lay down in their own beds, in the dark, and the whole house fell silent.

Mariana couldn’t sleep. The memory of the kiss kept circling in her mind, over and over: soft lips, a tongue searching for hers, hands on her body. Each replay left her more aroused. She wanted desperately to touch herself, but she was embarrassed Sofía might hear, so she waited for her stepsister to fall asleep.

When she thought Sofía was sound asleep, she began slowly, over her underwear. Then she slipped her hand underneath and stroked her clit, slowly, biting her lip so as not to make a sound. She was soaked. She pulled the sheet aside, lowered the garment to her thighs, and kept going, faster and faster, letting out barely audible moans.

What she didn’t know, with her eyes closed, was that Sofía had turned toward her bed and had been watching her from the first moan. Her stepsister was aroused too. She watched Mariana rubbing herself and, without fully thinking it through, she wanted to be the one making her come. She hesitated for a moment: touch herself in secret or cross to the other side. She chose to cross.

She got up without making a sound, sat on the edge of Mariana’s bed, and put her hand over hers. Mariana froze in shock, stiff as a board, holding her breath. But Sofía, as if nothing unusual were happening, gently pushed her fingers so she would keep going. She knew she would be startled, and so she feigned calm, only pressing her hand. Little by little Mariana relaxed and began moving again beneath her stepsister’s pressure. And then Sofía leaned in and kissed her.

—Are you really hot, little sister? —she asked in her ear.

—Yes. Too much.

—Is it because of the kiss that girl gave you at the party?

—How do you know? —Mariana could barely speak.

—Because I know you and I saw your face. Do you want me to touch you instead of touching yourself?

—Yes. I want that —she answered without hesitation.

Sofía moved her stepsister’s hand away and began stroking her clit softly, while kissing her again. Mariana arched and a moan escaped her, too loud.

—Shhh, they’ll hear us —Sofía whispered.

—Sorry, I couldn’t control myself.

—Moan, but quietly.

Mariana held back as best she could. Her stepsister’s fingers were driving her insane. To muffle the noise, Sofía kissed her again, and it worked: the moans were swallowed in her mouth.

—Take off your bra —Sofía asked, never stopping her touches.

She didn’t take it off herself because she didn’t want to pull her hand away from between Mariana’s legs. As soon as she was bare from the waist up, she sought out her breasts with her mouth and began sucking her nipples. Mariana bit the back of her hand to keep from shouting. She wanted to give something back and slid her hand under Sofía’s bra, brushing her nipples with her fingertips. That aroused Sofía even more, and Sofía pressed hard exactly where she needed to press. Mariana couldn’t take it: she came right there, with a cry that escaped her without permission.

—Shhh! They’ll catch us if you keep going like that.

—It slipped out —she panted.

***

Sofía took off her underwear and was left completely naked. She climbed on top of her stepsister and kissed her, then went down slowly: her neck, which she sucked until the skin turned hot, her breasts again, her belly, until she reached her pussy. There she lifted her gaze and searched for Mariana’s eyes. She found a silent yes in them, and started to lick her.

Mariana was out of control. She moaned loudly when the tongue brushed her clit, and forced herself to stay quiet when she remembered that people were sleeping on the other side of the wall. Sofía didn’t stop. She ran her tongue over everything, went back to the clit, moved it fast, sucked it. Mariana writhed in the bed, squeezed her breasts, bit her lips, beside herself.

—If you don’t lower the volume, I’m going to have to stop —Sofía warned her.

—I promise I’ll control myself. But don’t stop —she begged.

—I hope so. Because I love doing this to you.

Sofía buried her face between her legs again, feeling how wet she was. But the best part was watching her: the way Mariana shook, the faces she made, her body surrendered to pleasure. She kept going a little longer and her stepsister’s legs started trembling. Mariana stretched them out, rigid, and came in her mouth. Sofía did not pull away; on the contrary, she sucked even harder and slid her hands up to her breasts to squeeze them.

She was dying of arousal watching her come. She would never have imagined Mariana felt all of that so intensely. She herself enjoyed sex, but she didn’t come apart like that. That was why she wanted her stepsister to come as many times as she could, until she couldn’t anymore.

Mariana came twice more, until she asked her to stop, saying she was already too sensitive. Sofía stopped, climbed on top of her, and kissed her again.

—Now it’s my turn to make you come. And I hope you don’t make such a scene, because I’m going to have to scold you —Mariana said, and laughed.

—Not at all. I do know how to control myself, unlike you, you little drama queen —Sofía answered, laughing too.

***

Sofía lay back, dying for the same treatment. But she had to wait: Mariana began with a long, slow kiss, then moved down to her breasts, sliding her tongue over them unhurriedly. Sofía moaned, this time in a low voice, her breathing ragged, as if she were out of breath.

When Mariana noticed that her stepsister was beginning to touch her clit on her own, she understood the signal and went down. She ran her tongue over it once and Sofía let out a deep, silent sigh. She did it several more times, climbing up to the clit to suck it, and Sofía melted into sighs. She was completely soaked, and now it was Mariana who tasted something new in her mouth, the taste of another woman, something she had never tried before and that aroused her even more.

Without stopping licking her, she slid two fingers inside and began to pump them: hard on the way in, gentle on the way out. Sofía enjoyed it so much that she started moving against her hand, seeking more. Mariana followed the rhythm with her head until she felt her stepsister come. She pulled her fingers out, brought them to her mouth, and tasted them.

She gave her a moment and went back to the clit, stroking it while sucking her breasts. She made her come again, playing with her: a while with the fingers inside, a while outside stroking her, stretching the wait with a certain cruelty. Sofía thrust her hips hard every time she penetrated her again, and so she kept her going for quite a while longer, until she licked her once more and Sofía had another orgasm.

—Damn you! —Sofía said, her voice muffled.

—Who do you think I learned it from?

Then Mariana sat behind her, pressed her back against her chest, and slid her fingers inside. Sofía began to move slowly, then faster, harder and harder. But Mariana, giving her a taste of her own mischief, pulled her fingers out just when she was moving fastest and stroked her clit.

—Put them in already —Sofía ordered, taking her hand to guide her again.

—Now, just to be wicked, I’m not stopping until you come —Mariana answered, and started moving them hard.

—That’s how I like it, little sister.

Leaning back against her body, Sofía took the fingers without reprieve, moving against them until she came again, her whole body trembling.

—And since you seem to like it so much, now it’s your turn to taste yourself —Mariana told her, bringing the fingers to her mouth.

—Mmmmm —was all Sofía managed to say as she tasted them.

Sofía turned around and gave her a long kiss.

—I loved what you did to me. You made me come twice in a row, you cheat —she said, laughing.

—Look who’s talking, the other cheat.

—It’s true. But you can’t tell me I didn’t make you come.

—Why would I lie to you. A lot —Mariana admitted.

They both laughed, exhausted. They put their underwear back on and lay down, each in her own bed, their breathing gradually settling in the dark. Before falling asleep, Sofía murmured:

—What luck that you got that kiss at the party.

And the two of them sighed at the same time, knowing that unexpected visit had left them with something neither of them would ever forget.