As the pod pushes up through your anus, your penis stirs to life. You don't find anything erotic about this experience; in fact it's scaring the shit out of you. Suddenly you feel the pod begin to expand in your hole, stretching it to its limits.
You feel then it begin to pulsate.
"What the hell is going on?" You cry out loud. As if in reply, you feel a liquid stream rush up into you. You don't know what the vine is pumping, but it relaxes you quite a bit. The liquid is then pumped faster and you begin to feel bloated. Even with the induced fog in your head, you can see what's going on-
Your stomach is slowly bowing outwards! The plant continues to pump away, your six-pack vanishing under the expanding globe that is your gut. The inflation doesn't stop there though. You can feel your ass cheeks swelling and your pectorals have started to rise like bread in an oven. Your arms and thighs become less defined, but are nothing compared to your gut, which, now the size of a large watermelon ball, is beginning to distort your whole torso- giving it a barrel look.
The pumping dies down and you feel a new sensation. The vines are beginning to loosen, and are now crawling up your butt. Soon they disappear up your ass. You reach around your fat and bloated form as best you can and probe your ass with your fingers. You don't find anything, not even any of the liquid it pumped into you.
You shake your head to clear it as you rise up onto your feet. You look down to find that your gut resembles an over inflated beach ball and the rest of your body isn't doing any better.
Your tummy groans in protest of the new swimming pool and occupant you just picked up...