Abreast of the situation

You knew that penetration was most definitely past both of your limits for now and her using her mouth was also something not yet specified by the KDK so you decided to avoid taking any chances in that regard.

Looking around her room at the various countertops and storage space she had, you eventually found what you were looking for and got up from the bed to grab it, meaning Sarah had to stop her stroking for the moment. At first, she seemed confused at what you were doing but seemed to perk up when she realised you were just taking a look around and not just heading towards the door.

She lit up even more when she saw that you had grabbed a bottle of lotion that she had sitting on her table and then returned to where you had been sat previously. Your jeans and underwear had been discarded when you got up and although it was strange to walk around in just a t-shirt, you felt like you could get used to the feeling of being naked if the opportunity presented itself.

You first opened the bottle and let the lotion pool on her chest, both of you watching as Sarah realised what you were planning to do. Your dick was still hard as a rock as you moved from where you were and straddled her torso, firmly trapping her between your legs with your dick now resting in her cleavage. Sarah did nothing to stop you as you spread the lotion over her chest, first using your hands before switching to rubbing your dick against her, thoroughly coating it. This was your first time doing something like this and although you had done similar acts with your sister, you still felt a bit apprehensive to just start taking control. Asking Sarah would defeat the purpose but with her now trapped, you at least wanted to give her an opportunity to voice her feelings, if only indirectly.

“Are we still continuing the roleplay of you being Lucy or do you wanna give up on that?” you asked, seeing that her eyes were still wide open as she stared at your crotch resting against her.

“It's not like I can compare to her size anyway” she replied, looking a bit crestfallen at her own comment.

You had always joked with her about being flat-chested and ‘flat as a board’ was an insult you had unfairly used when you were both younger. She had increased in cup size since then and although she seemed small in comparison to Mom and Lucy, you would say she was around a B or a C-cup if you had to take a guess. Still big enough for your cock to snuggly slide between them but it seemed she had a complex about her size.

“I wouldn’t be in here doing this if I didn’t want to and Lucy isn’t currently the one with my cock between her tits is she?” you asked, rubbing the tip of your dick over one of her nipples to emphasize your point.

“But if she did ask then would you?” she continued to ask with a worried look, forcing you to sigh.

“I’m gonna be honest with you, it's got nothing to do with anyone's size. If Lucy offered then sure. If you offered? Absolutely. But if a random woman on the street or even a girl in our year at school offered then I'm gonna say no, no matter how big their chest is. Both of you are special to me in your own ways and if you ask me…” you said before pausing, pretending to look around the room as if Lucy could somehow hear you.

“...You have a better ass compared to her” You whispered, getting a smile out of Sarah for the first time in this conversation before you carried on.

“Now, if you're done being mopey...” you declared, putting your hands either side of her breasts and emphasising her cleavage a bit more for your dick to slide between.

The lotion you had put on before felt amazing as you started thrusting against her chest, with the heat from Sarah's body adding to the experience. You had never done this before and although you had been rubbing your dick against her pussy only this morning, this felt like you were more in control of your actions instead of just giving in to your desire. You felt more powerful with you towering over her, using her body for your own whims as the both of you watched your cock rub against her skin.

Sarah didn’t seem to mind being **** to be your sex toy and even her breath that you could feel against your shaft seemed to be getting heavier. You were starting to thrust faster as you got used to the feeling of her tits, when you felt one of Sarah’s hands trying to reach for her pussy again. She had already got herself to one orgasm so instead of letting her be, you decided to try something more in line with her ‘freeuse’ kink and see if it went down well.

You moved your arms away from her chest, much to her surprise, and grabbed both of her hands before moving them to replace the grip you had been making on her cleavage.

“Ah ah ah, your gonna have to get me off first if you wanna start playing with yourself again” you demanded, getting a wide-eyed reaction from Sarah that only seemed to make her more excited than before.

She did as you asked and pushed her boobs together, giving you an opportunity to hold onto her with a better grip and increase your thrusting yet again. With Sarah taking over your role, you saw no reason to hold back any longer and just solely focused on getting yourself to cum. You even added a bit more lotion between her tits when you got the chance and made it even smoother as you glided against her skin.

“How does it feel?” Sarah lustfully asked as she continued staring at you from below.

“Amazing” you immediately replied before coming up with a better answer.

“I’m pretty sure this is gonna be the fastest you've ever made me cum, if this keeps up” you added, feeling yourself slowly get closer to an orgasm as the pleasure increased.

“Oh yeah, and do I get a choice in any of this?” she asked, purposefully leading you on so you got her more excited.

“Of course not, your job is to hold your tits like a good...little… fuckdoll!” you replied, emphasizing your words with your thrusts which only seemed to increase the passion at which Sarah stared at you. The fact that she could do anything to fulfil her urges, seemed to only make her even hornier than she was before.

“And what can this fuckdoll do to make you happy?” she asked, increasing the pressure between her tits as she pushed them harder together, even playing with her own nipples to give herself some extra stimulation.

You could feel yourself getting closer with her added dirty talk and continued to shove your dick into her cleavage as she spurred you on.

“You can let me cum all over you” you said as you carried on fucking her chest, getting closer to your tipping point.

“Am I gonna make you cum? Come on, please cum on me. You can cum wherever you want!” she exclaimed, giving you further encouragement and a choice of where you were going to finish.