I was thinking it'd kind of be nice sitting on the couch with someone, maybe watching a movie or just cuddling, close & comfy.. they start growing slowly, and it takes them a bit to notice, but they just keep growing. Being already so close and snuggled... I think it could be special.
No, but you're so right and you should say it. Casual, comfortable growth is an absolute champion and it should be celebrated more.
It's a movie the both of you have seen a dozen times, but you still laugh at the jokes and mouth key lines along with the actors. They lean their head against your shoulder, settling in under the blanket across both of your laps, a bowl of popcorn nestled comfortably between the two of you. It's a place the two of you have been so many times before and yet it's still so nice to come back to.
About half an hour into the movie, they start to shift. Something just feels a little off. The discomfort isn't bad enough to pause the movie or even get out from under the blanket, but it still warrants a little adjustment. They sit up and adjust their shirt, tugging it down where it's ridden up, their brow furrowed as it seems a bit tighter than it did when they sat down. Their belt, too, seems a little constricting, but it's at least easier to blame that on the now mostly empty bowl of popcorn. You glance out of the corner of your eye and maybe you recognize that their chest looks a bit softer, a bit fuller than it did earlier. Could just be the light of the TV, though. You brush it off as they settle back in for the rest of the movie.
Another thirty minutes and the growth is getting harder to ignore. On two separate occasions, their head has bumped into your chin and they've had to shift their hips to remain in the same spot. But the blanket is so comfy and the movie isn't even half over. The two of you share a knowing glance, eyes meeting as you glance to the side, and their lips curl into a charming smirk. They yawn, stretching their arms above their head, arching their back. The seam of their shirt audibly creaks and the anime characters on the front warp as the fabric stretches over their swollen breasts. They reach down and undo the button of their jeans, their hips surging out to the side as they're no longer contained.
But the end of the movie, the two of you are still cuddled up together, just in a slightly different way. Instead of them leaning against you, you're now perched on their lap, soft thigh and wide hips supporting you from underneath. Their enormous breasts make for slightly embarrassing but incredibly comfortable pillows as you lean back into them, feeling their chest rise and fall with each breath. After the credits roll, you tilt your head up to look at them, meeting their gaze as they look down at you. A tension fills the room, a question lingering in the air: which one of you will broach the subject first? Which one of you will acknowledge what's changed in the last two hours? They do have an easier solution, though:
"...You wanna watch another one?"