Before you can consider your options any further, you feel the plant begin moving again. This time, however, the activity is centered in your crotch. You roll over again onto your back to see what is happening and groan in misery: your cock and balls are being pulled back into your body. They disappear within your flesh, leaving the small hole of your urethra.
You can still feel them within you, being transformed by the plant. The the hole opens up and inverts itself, revealing a new green organ from inside you. It looks like a human penis (albeit a very large one, about a foot long), but it is green, slick, and segmented into four sections. You curiously touch the tip and each section separates, folding down and opening up into four large, luscious petals. They are vibrantly colored inside, starting off orange towards the tips and becoming a deep scarlet towards the base. In the center of the petals is a hole which the petals press closed, but when you press at the entrance they part to allow access to a cavity similar to a woman's vagina. You can only imagine that this is your new womb, ready to make some kind of horrific alien spawn from your loins. But why the penis shape? Maybe you could still produce your own semen: the plant was covering all possibilities.
You finally decided it was a mutualist symbiote: in return for making your healthy and giving you pleasure, you had to reproduce for it. You weren't sure what to think. Could you willingly be apart of this plant's invasion? At that thought, a tendril poked its way through your skin above your navel and travelled to your new hole. It inserted itself and sent you into a fit of ecstasy. You could feel it begin excreting some substance within you which travelled up to whatever your internal organs looked like now and began impregnating you. The gestation was a fast as your original transformation and before long you had a seed pushing its way out of your new organ. It fell to the floor and began rolling away. You leapt out of bed and caught it, but it burned in your hands. You dropped it again and it rolled away, looking for another host.
The tendril pointed after it, giving you your ultimatum: find someone to impregnate or bear the load yourself. You had to do what it wanted, but who could you find?