"What did you do to me?" you whimper. Standing over you is the seemingly unimposing figure of the witch responsible for your current state. She kneels beside you, stroking your hair with the back of her hand. You shudder at the gentleness of her touch, the faint smell of cloves and her soap wash over you.
Your stomach answers before she can. Another growth spurt brings you closer to the floor. Your gravid belly wobbles below you and soon being on all fours won't be enough to keep it off the ground. She feigns innocence with a sweet, guileless look that sends pangs through your entire body, "think of it as personal growth. Now sit back honey, or you might get stuck there"
Terror breeds obedience and you're incredibly afraid. She helps you into a sitting position just in time for your gut to grow enough to start forcing your legs apart. The soft, warm sloshing motion going on between your legs works it's own kind of magic. The witch takes you in her lap, sinking her hands into the plump flesh she put on you. "You see," she purrs in your ear to the backdrop of the panting moans you struggle to keep down, "some potions just don't turn out right in a cauldron. They need a more lively vessel"
She kept explaining but they only thing you can focus your attention on is the gurgling of your growing belly and the waves of pleasure that crash over you when she touches you just so.
You try to take inventory of your body while you can still think straight enough to do so. You were never particularly fit but even so, the moobs- no, breasts sitting on top of your belly are new. Your arms, your cheeks, even your fingers all feel soft. Plump. Your thighs are getting thicker but that's not stopping your tummy from spilling down between them. Your pants burst long ago and every passing moment you can hear the elastic in your underwear pinging as it snaps strand by strand.
A bigger spurt of growth hits you and this time you can't resist. You moan. You aren't sure if that's when you started grinding into your own gut but the witch is laughing now, every gentle pat she places on your belly ripples down, giving you another hit of ecstasy.
She nips your ear, her off hand playing with a nipple through what's left of your shirt, "You know what tubby? I think you're my new favorite toy"