Try to get her to admit it

You were still slightly horny and given that Lucy was acting like she was doing you a favour when she clearly wanted to get you to cum for selfish reasons instead, did make you feel an urge to mess with her a bit.

“I think I’m just gonna go to sleep. Unless you want to do something?” you asked, a hint of something in your voice as if you were expecting something from her.

“No no I…yeah let’s go to bed” Lucy replied, not being able to say what she wanted.

With Sarah taking up one side of the bed and not being in a state to care about how much room she was taking up, that left you and Lucy with only one half of the bed to share. You naturally got in the middle between the two of them after you turned off the lamp at the side of the bed closest to Sarah, placing your phone on the table in the process, you watched Lucy do the same with the light at her side and got under the covers.

You weren’t about to let her get away with just chickening out this easily and once you were both settled down under the covers, you made a move to start things off again. Once your eyes had adjusted to the low light in the room, you could see that Lucy had been facing away from you on her side as she lay down. With her back to you, you moved closer and wrapped an arm around her, at first leaving it draped over her stomach before you did any more.

“Is this okay?” you asked, noticing Lucy moving her arm up from her crotch where you suspected she was trying to get herself off quietly.

“...Sure” she replied after a pause, letting you get your other arm under the crook of her arm so you could properly hug her close to you.

Knowing she was still horny helped speed things along as you snuggled in closer to her, letting your cock press against her ass while you reached up with a hand to grab at her chest.

With your grip on her, you acted like you were only pulling her as close as you could into a hug but you made sure to casually grind against her in the process, giving Lucy no chance to ignore your cock now wedged between her cheeks.

“Max?” Lucy called out, trying to get your attention.

“Mm Hmm” you replied, acting sleepier than you were.

You waited for a response but one never came, now making you get curious at how long Lucy would ignore this or if she would never reveal what she wanted.

A part of you wanted to prolong this but you made your hands make small movements to keep her on edge while you stayed close to her, feeling her hand drift back down between her legs while she thought you weren’t paying attention.

Now it felt like you were playing the waiting game as you let her play with herself while you let your hands move to turn her on even more, only moving when you thought she wouldn’t notice but still touching her more sensitive spots.

“You know…” you said, breaking the silence and feeling Lucy freeze in place.

“You could have just asked instead of trying to be sneaky” you added, starting to move one of your hands further down.

It had been resting on her stomach but you brought it down to rest on top of Lucy’s hand covering her pussy.

“You said you wanted to sleep” Lucy whimpered, not knowing what to do after getting caught.

“No… I asked you if you wanted to do something and you lied. You clearly were worked up after tasting Sarah’s cum and you didn’t want to admit it. I bet you can still taste her on your lips can’t you?” you questioned, knowing Lucy would be licking her lips even if you couldn’t see.

The fact that you felt her hand move under yours only seemed to prove your point and she didn’t even seem to realise she was doing it, getting wrapped up in the fantasy of tasting her sister again.

“Look, you seem to be getting more honest with me and I know it’s gonna take time but I think you really need to let me know what your needs are. I know I’m not the best at it myself so we can work on it together but right now, I want you to tell me what you want” you urged, putting her on the spot in hopes she would reveal her feelings.

“I… want to cum and I want to taste your cum” Lucy admitted.

“See, was that so hard? And I think that can absolutely be arranged” you replied, feeling her relax into your arms as you spoke.

You still had one arm trapped under her that had been lightly groping one of Lucy’s tits so you moved the other from where it rested over her pussy to between the two of you. Your cock had still been trapped between you and her but with an arm free, you took hold of it and pushed it between Lucy’s thighs.

You clearly heard her gasp at the movement but you didn’t plan to go any further with her for the same reasons you had mentioned to Sarah, instead letting yourself slide over her pussy so you were essentially fucking her thighs.

Her fingers were still resting there from where she had been playing with herself and she lightly cupped the head of your cock in the palm of her hand, pressing you closer to her mound where she could use you to apply more pressure to her clit.

“Are you okay with this?” you asked, knowing you were dangerously close to going further and wanting to get her opinion in case either of you made a slip.

“God yes” Lucy replied as quickly as she could.

With that, you began pulling your hips back, slowly letting your cock run along her lips before pushing forward again. She was already wet enough that your cock was getting coated in her juices and with every thrust you felt her thighs get soaked even more, letting you slide between them easier for an even better fuck.

You were riding high from the pleasure and now that the pretense of hiding from each other had now been dropped, you were both looking for something quick to get your current lust out of your system.

Your hips went faster and the sound of sex filled the room, the slap of her ass and her moans getting louder every time you pushed into her. Neither of you worried about waking Sarah up and it was starting to feel animalistic as you were fucking in all but name.

“Fuck I’m close” Lucy whispered, still pressing you against her clit at every chance she got.

With the amount of times you had cum today you knew you weren’t going to cum at the same time as her and Lucy would reach her peak first and even when lust was starting to cloud your judgement, you wanted to push her over the edge even if you didn’t.

You upped the intensity of your thrusts and your free hand gripped her tits even harder, holding her in place so all she could do was feel the pleasure between her legs.

“Fuck, fuck I’m gonna cum” was all Lucy could repeat, pushing you onwards until you felt her freeze and lock in place.

You kept up the **** on her as she tensed up until she could no longer hold it in, a guttural moan finally escaping her lips as if the dam had finally broken inside her.

She shook in your arms and you gave one final thrust to push against her clit, feeling her hand vibrating you against it to get herself that much higher. Feeling her body to get every ounce of pleasure that she could find in the moment until she became too sensitive to handle any more.

Eventually, she seemed to collapse in your arms and the sounds of her moans quietened down. Only the sound of heavy breathing now coming from your sister.