Moving back from the kiss you take the time to look more at how the two of you are joined, where Sophia's spine should end at her tailbone it goes into your flesh, her smooth back melding into the skin. You run your hand down your chest, from the thick hair on the pecs down, a slight murmur of delight from your bodymate. Running down your abs, you notice your bellybutton is no longer present, the snail trail of hair from chest to crotch now uninterrupted in the groove of your abdomen. Pubic hair starts where your bodies meet, running the slightest bit up her back before dissapearing, the smoother skin of her body bringing your trailing hand back up to her back.
Throughout you can feel her in front running her hands up your shared legs, leaning forward to inspect the toes you are wiggling. You notice in the corner of your eye the feet have more toes than expected too, some of them melded together, the feet wider than normal, your hands have a new digit between the thumb and index, you somehow missed in the excitement.
"Huh." you hear, while investigating the dexterity of the new digit, working as a thumb and finger depending on the task.
"what?" you respond while investigating how your thumbs seem to be wider having two nails on them, a part-duplication maybe?
"oh nothing, just I can feel you feeling around back there, I think it's got us a little excited..."
The comment instantly cuts your focus from your new hands, you can feel your crotch... well, her crotch, it isn't exactly something you have now, looking down at the torso in your lap, where your cock was. Leaning forward, so your body touches Sophia's, you rest your chin on her head, and notice the throbbing monster in your shared pants. There's another feeling you haven't felt before too. Sophia looks up at you.
"Wanna..."
In response you stand the body, and help her strip yourselves infront of the mirror. Dropping the pants, you see Sophia's vagina, with your penis pushing out from inside it, where the clit would usually be, your long, girthy member reaches out, only it seems like your legs new thick muscle upgrade, you got one of those down there too. The monster must have been atleast 9inches and something crazy like 5 or 6 around. You can feel the inner clit must still exist, as there's a sensation from inside aswell as you instinctively push your hips forward, the penis stimulating it.
Sophia moans slightly, and as the vagina moistens, she reaches a hand down, discovering the last part of the new arrangement, a scrotum of four egg shaped balls hiding under the vagina. Feeling everything at once, you both feel an urge.. no a need to satisfy your primal hormones. Sophia twists to make out with you, though you have to arch your back slightly. You both fall back onto the bed, the quartet of hands working off instincts alone, some of which must have come with the merge, as you instinctively finger the vagina, while cupping your balls as sophia begins working the penis, and tries to reach an arm behind to stroke your chest, finding your nipples,knowing you like that, though struggling to reach the spot below your left, you learned was actually a third not long before your new... circumstance. You collectively work to completion, taking over feeling parts of all areas of your body, arching your backs forcefully before the fireworks of orgasm in two different places, and after the first, another, and another, swathes of cum covering Sophia's chest, a little making it onto you. You feel her body, warm, panting, lying on yours, penis still hard to attention. It was gonna be a long night.