Some sort of urethral plug and into her penis

Kelly held an object in her other hand before she stuck it to the wall and she applied some kind of sticky lube to it before sticking Jack to it his back against the object so Jack was looking at the rest of the room and Kelly, her naked giantess form loomed over him speaking " Jackie I changed sex up a bit so don't go expecting it to be exactly the same as before, but in this reality this version of me has taken enormous levels of pity on you as I decided I want you going in my penis. I'm super horny right now and it probably means I'm ovulating a lot of ovum's currently, as you can see I'm obviously not pregnant right now and I just don't feel like getting my period this time so your gunna do me a favour and become one of my babies if you can, of course you'll have to go inside now so I can merge you with one of my ovum's before they get fertilized by whoever I can find to have sex with me, of course I'm still going to need their sperms to impregnate me and turn you into a baby i mean if yo ucan get there in time, i mean you should have enough of a head start so don't fuck it up." Jack panicked as she stepped over him her large still flaccid penis looming over. It was soft to start but soon became hard, getting bigger, longer and more intimidating as it did. A bead of clear pre on the urethra at the tip waiting for him. Jack could also see her erect penis which appeared to be normal looking at first glance. Upon closer inspection as it got closer to him literally it was notable that the entrance looked a bit strange though but Jack chalked it up to him being small and it being super big. Not only that but her her ball sack below was also very large with big hefty looking sacks but for some reason from where he was positioned they kind of looked a bit empty and deflated to Jack, like there wasn't exactly balls in them not that it was his biggest thought at the time.

Seeing the approaching giant somehow labial like penis hole rapidly approach, Jack screamed out a last ditch attempt to reason with her "Noooooo Kelly don't do it, i dont want to go in your penis, i dont want to end up in your balls and get **** by sperms then I don't want to be eaten by a baby noooo I don't want to become pregnancy food and die, its to dangerous i dont want to get a head start or whatever its just some sick game, turn me back to normal please. ". He screamed.

Kelly looking down at his tiny body which she had made a bit smaller now "You won't die dumb dumb, i made it so you cant die remember and you wont become baby food unless your like super slow I said already I want you to merge with one of my eggs to become my baby so your gunna have to go in my penis to get a head start to my ovum. I know it's gunna sound weird but trust me I made biology work different and this is the correct place for you to go, plus your going to love your time in my sacks I bet, you little sissy submissive boy merging with my ovum, then all you got to do is wait and see what sperm gets to you first. Since your gunna turn out to be a sissy anyways Mumma Kelly's gunna raise you to be a top tier sack womb girl, you know one who only gets the submissive role, maybe I'll have you go threw life as normal or maybe ill change reality again, age you up super fast since you have an adult brain already then ill take you for my own, fuck you all the time, I mean there isn't such a thing as **** in this reality. I don't know who I'm going to have sex with next I haven't decided, but it won't be hard to find someone, but I know the role I want be in, I'm a mature woman now I need to show that and get my first pregnancy growing babies in my wombs.

Jack still confused by most of the things the giantess and giant penis Infront of him kept rambling before he braced him self as she swiftly pushed her erect penis against him positioning him and the tip of the urethra against him. Her penises sticky dick lips rubbing onto him and the object behind before she thrust forwards. Jack was thrust inside her, her inner penis walls sucking and clamping down on him slick and wet, he suddenly felt himself peeled away from the urethral insertion object and sucked in deep inside of her being squeezed threw a tight tubes and then falling somehow into some much larger containment area . Regaining his senses he looked around to discover he could see rather well and that this place wherever it was was huge either that or he had shrunk more. He tried to stand and was able to though it was difficult as there wasn't really a floor as such more like he was floating in space. There was an edge of sorts or a floor which seemed to constantly wobble and shift constantly as did any and all other wall like barriers around him in all directions like some kind of fleshy earthquake. That's when he noticed the second thing around him there were a couple of orbs which glowed, he tried to move closer to get a better look at what they were and didn't realise when approaching one that he got close before something happened, it's like he was sucked into it by a gravitational pull and he slipped inside it. It consumed and trapped him, he felt super strange as he sort of just dissolved into it or it into him, becoming it or merged with it like Kelly had said, "Oh god am I part of my sisters egg now or something crazy, Kelly what have you done to me and wtf is going on." he mumbled as his body dissolved but it somehow became the ovum itself, he was an ovum just a Jack shaped one now.

Jack felt his whole body fusing to the inside of the ovum, Jack becoming the egg and fizzing inside it, his whole egg body was tingly and strange. It kind of smelled and tasted like egg inside his egg mouth, which wasn't to surprising but as he breathed and by proxy drank womb juice and his own ovum's internal substance or DNA somehow he was finding more and more his ovum brain and egg body were gaining something he hadn't had before. Obviously Kelly's DNA for a start programming him and his new ovum body for his role as a reproductive cell but also the egg was filling him with tones of pure estrogen and the more he took in the more his ovum thoughts started to change more into what he could only describe as 'baby making thoughts', a primal need to be impregnated, **** by a strong healthy futanari sperm and then to take its DNA inside and make it his or maybe rather hers and since he was a sissy cell combined with an ovum, a dysfunctional future being he would be tricking this sperm almost into fertilizing him and giving him life to make a body again. Additional to this he was starting to be able to see more clearly, probably something Kelly had done or maybe eggs could see? At least now he could see where he c he was again, he was inside Kelly somewhere and weirdly now it was like he could see the world around him? Or rather not see from a normal perspective but he could see some kind of Kelly perspective it was a strange angle that made him realise he wasn't really seeing from her eyes but he could at least see some things just everything around from his current location and could tell like what she was doing. It seemed like from the angle he was at he was now in her ballsack but that couldn't be right could it? Also the walls were now see fully transparent so he could see outside them. At the moment he could only see vague patterns which must have been her panties or lingerie underwear which had her junk stuffed in, it looked like it could be something sexy too like some lace panties or some kind like sexy lingerie but in his brain something told him soon he would see her remove them and some strange form of sex happen and when it did he wanted to catch a sperm and use it to become a foetus, at least that's what his ovum sissy cell like body was telling his mind now repeatedly like a forward prompt command thought. But thinking about it since he was in her balls now, how did sex even work and who would Kelly have sex with, he didn't know but he knew the more he wondered it's like he could tell Kelly only got more and more horny. His ovum body was getting more and more horny too, he could feel himself sending chemical hormone signals out of him into Kelly thoughts of sexy women maybe preferences, question was what was Jacks and Kelly's preferences or what mates were available.