Start turning into a berry while inside me, why don’t you? I’d get to feel you fill up with juice within and around me. If it’s contagious we’d grow together after I’ve endured a good amount of stretching.
Since you asked for writing prompts…
Hooo boy~ This one prompt has so many ways I can spin this~ I'll just start with one and revisit this again later ;3
2026 Writing Challenge #2 & 3
The day has finally ended and we find ourselves in bed, wrapped in each others arms. We take the time to explore our bodies, nothing separating our skin. We share a kiss that quickly turns passionate. Our legs locking together in an attempt to get our bodies even closer together. You can feel my eagerness rise. And my cock. I tease you a bit, rubbing the tip lightly up and down your lips tantalizingly. You break off, holding a finger to my lips before winking and slipping out of my full body hug. I watch you turn over to grab something from your night stand before inviting me to sit up. I comply eagerly, only to be met with a stick of gum at my lips. I part them and allow the treat to be slid onto my tongue. Your hands slowly slide down my chest, wrapping around my waist, and finishing off by giving my cock a squeeze to make sure it's still ready for the next part. I chew away, feeling the blueberry flavor take over by body as I watch you turn and bury your head in the pillows, leaving your ass up in an invitation.
I take your offer, but tease you yet again, rubbing my tip up and down your exposed lips. Watching the blue spread down my chest. Watching it envelope my arms as they each grab your hips. Down to my waist and past what I can see under our two bodies about to plug in. And finally, I see the blue reappear on my shaft, seemingly reaching out for you. You feel me twitch against you in anticipation. Now's the time. I pull at your hips while thrusting mine, shoving my cock deep into your vagina, sheathing the blue within you. I start slow, but increase my pace. *Gurgle* The one sound that can be heard over our bodies smacking together. You can feel my stomach against your ass with each thrust. It's usual roundness making for a nice padding. Until it surges forward. Up and over your round cheeks. My belly inching forward, further and further over you, creeping toward your back.
But that's not all that grows. My cock is normally a good size for your needs. Just long enough, but just a bit too wide, stretching you out. Just enough to feel good. But now you feel it puff out. Widening as I grow. You can feel your lips protest as my usual inch wide grows slowly. You can also feel my tip press further and further into you. It's starting to hurt a bit, but nothing you can't handle. You did plan for this. You feel my arms puff up as well. My thrusting slows as my legs make movement difficult. You thrust harder and faster to try to keep the momentum. The task getting difficult for you as well as my cock continues growing with me, making it harder and harder to shove me back in.
I've eventually slowed to a halt, but you feel my hands grip your waist. It feels as though I'm trying to yank you onto me, but in reality, I'm losing the balance on my knees and grabbed you before letting my growing form fall back. Your pulled into the air with my momentum before my hands fall to my sides, too big to move. The impact shoves you further onto my cock. You are stuck in an upward position, your legs straddling what's left of my growing waist, all you can see of me are what's left of my legs, slowly sinking into my rounding form. My cock continues it's growth within you, pressing your gut outwards. You bring your hands to your stretching stomach, only to be met with the feeling of my engorged tip. A blue blemish appears on your skin. A hint of the final part. You squirm to try to find footing on my round form. The movement eliciting moans from the berry you are on, causing my cock to twitch inside of you. You shudder in a mix of pain and pleasure. Your hands falling on your bulging gut again.
You notice the small blemish got a bit bigger since you last saw it. Right before feeling me convulse within you. Suddenly, your find yourself full of juice, your stomach stretching further and further to contain the juice I'm cumming into you. Your stomach now completely blue, you hardly have time to process your own orgasm before you start growing on your own. Your tits and ass surging outward. The blue having spread all over your body. You feel my cock twitch again. This is going to be a long night.