Jessy

Your mom was curvy and hot, yet already quite old for your taste while Sam was beautiful and young, yet wasn't as curvy as the rest of your family. Jessy however combined the best of both worlds, being only in her early twenties, she was still very young and beautiful, yet she also had the big curves of your mother, making her extremely hot. She was also two years older than you which made the thought of taking on her form even more appealing. Knowing your dad was working and the rest of your family was downstairs, you make your way into Jessy's room, and lock the door behind you. You had to hurry before anyone comes back and notices you in her room so you quickly undress. You've never really been much in her room so you didn't really know where to find any clothes to wear so you just start looking through her closet. You instantly find her underwear in a drawer (Well, it wasn't really hidden but anyway). You take out a normal black bra and matching black panties. In Jessy's closet you also find a thight red top she loves to wear in the summer and which shows of her big breast pretty nicely and you find some thight black jeans. You start your transformation by simply putting on a pair of white socks, causing your feet to shrink. You continue by putting on her black panties and her jeans. You couldn't believe it! You were wearing your own sister's clothes like a fucking creep. Well you somehow are a creep, but soon enough you'll also be your own sister. Your legs start getting shorter, till they match the length of the jeans you're now wearing. You feel your dick shrink and turn inside, getting replaced by your big sister's vagina. At last you can see how your ass begins to inflate, beautifully filling the jeans. You turn around, looking at Jessy's ass in the mirror. It was big and perfectly rounded, yet she was still fit enough that it was quite toned. You can't help but give it a nice grab with your male hands, causing a shiver to run through your body and your new genital between your legs to get excited. Quickly focusing again you continue with putting on the bra and the thight T-shirt. At first you see your arms and torso shrink, loose muscles. Yet you notice that Jessy clearly was more trained than Sam and Beth since she was the captain of the school's volleyball team. All her friends were in said team too, so like your sister they were all very fit. The best transformation was yet to happen, as you closely watch the cups of your bra fill with flesh underneath your T-shirt. Just like her ass, Jessy's breast were big, yet nicely shaped. You can't help but notice that your sister had one of the most fuckable bodies you could imagine. A perfect ass with matching big tits, while still looking extremely fit. To finish of your transformation you take a pair of sunglasses laying around and put them on. Your hair starts to grow, stopping only a couple of centimetres above your tits, while also changing colour into a nice blonde. At last you complete this perfect body with a matching face. You wouldn't say you were bad looking but your sisters definitely got the best of your parents genes, flashing yourself your sister's beautiful smile as you realise you've now completely taken on her form. After taking off her sunglasses again you examine your new body. If god didn't want you to lust over your sister he clearly wouldn't have given her such a perfect body. New memories flooding your mind, memories of volleyball, her friends and every other minor thing you might need to take her place. Most exciting of course were the memories that told you information about your sister, no brother should ever want. How she never had a boyfriend yet lost her virginity to a childhood friend. It was her 18th birthday and all her guests were already gone, he decided to stay and help. Your sister knew he had the hots for her and since he started to work out a year prior he was quite cute himself so one thing lead to another and so Jessy ended up on the couch in your living room with him pounding her pussy. They were fuckbuddies quite some time until he got a girlfriend, which resulted in them stopping to see each other. You also remember that Jessy has also made out with one or two hot guys on parties, sometimes even going home with them and spending the night with them. So your sister was quite active in this part of life, yet she was far from having sex on a regular basis, being the volleyball team's captain sure resulting in some male attention too. You sure had a lot to look forward to in your new body, but back to now.

Who would you be if you didn't test this body before doing anything else? Sam and Beth might have been hot, but neither of them had curves like Jessy, so you sure couldn't wait another second. Quickly you get out of your socks and jeans before admiring your new big ass in the mirror. Your panties went already missing between your cheeks and you give it a nice slap. You sway your hips a little, nicely causing your ass to giggle a bit. Turning around again you pull the shirt over your head presenting you Jessy's big tits in her hot bra. You look in the mirror as you slowly reach behind your back and open your bra and letting it fall onto the floor, giving you a view of one of the best tits you've ever seen. Not that you have seen many tits in your life. To be honest you have only seen Sam and Beth's tits in real life, apart from that you only could compare her to women on the internet. But they looked perfect so you took both of them into your hands and gave them a nice squeeze. Even in your original male hands they wouldn't even be covered properly, but seeing your sister's petite hands trying to hold them looked adorable. Yet the feeling they gave you was something else, you feel your breathing getting heavy as you fondle your new tits. Soon enough one of your finger finds a nipple and you moan in suprise. Fuck, did they always feel this good? You notice a big wet spot between your legs and decide to finally strip out of your panties too. Now looking in the mirror you could see your big sister Jessy, naked and already dripping wet. A sight no brother ever was to even imagine, but thanks to your new powers this was all part of the new reality you were now living in. You let yourself fall down on her bed, which smelled really nice. Quickly you continue massaging your breast with one hand, while the other one slowly finds her way between your legs. You use your new memories to start rubbing your pussy, exactly like Jessy already has many times before. After a couple of moments you notice you are wet enough and slowly start inserting two fingers inside of yourself. You have a hard time keeping yourself quiet as the pleasure only starts to increase. Although masturbating was completely normal and Jessy did it quite regular you didn't want anyone from your family hearing her (or yourself at the moment) moaning through the house. Soon enough you feel yourself close to cumming. You quickly turn around and lay on your stomach as you feel the orgasm building inside of you. Feeling your big breast being squashed between your body and the bed, your ass up in the air and your slender fingers still going in and out of you finally gets you over the edge. You quickly press your head down as you start screaming into Jessy's pillow. Your legs begin to shake and soon enough you drop to your side. It takes you a couple of minutes to catch your breath, this body sure is amazing. Soon enough you put your dirty underwear away and dress in a new pair before putting on Jessy's jeans and shirt again. After fixing your hair you again looked like ordinary Jessy, now ready to go out into public again, no sight left of the fact that her younger brother just used her curvy, fit body to get himself off and is still controlling her.

Jessy planned to meet up with her friends now, but sharing is caring, so you might as well take advantage of your original body that was still in his room. You could also feel that Beth was still at home so you might use your new body to have some lesbian fun with your cute neighbour.