"It's weird, but why not? Let's try." she says.
Once again she walks up to the guillotine and the blade cleanly cuts off her head. Her headless body walks up to her cheerful head and picks it up, placing it on the table.
"Okay, now you go!"
You're glad she's so willing to do this, you expected there would be some resistance from your sister as you were going to switch bodies, but she seems just as excited about this as you are. As you lie down and pull the cord, you see the blade falling down. Your vision then slowly tumbles backwards as your head is falling. You can still feel every part of your body, it's like your head was never separated. You try to stand up and grab your head. It's harder than you expected, because your vision didn't shift while walking, but you are able to lift your head up.
Your sister's body is still standing there near, leaning on the table. You walk over to her and promptly she grabs her head from the table and places it on your body. You feel a shiver, but all of a sudden it's gone. You don't feel anything anymore, except your head. It's a strange feeling, you feel very vulnerable at the moment, and you should.
THUNK. You hear your sister's body falling on the ground. Now your sister isn't the skinniest of people, she's actually quite chubby, so you imagine the ground not agreeing with this. She probably lost control over her body as she took control over yours.
"Wow, this is unreal!" you hear your sister yelling above you. She turns your head around in what used to be your hands. You look up to see your sister's cute face on your male body. For a minute she places your head on the table and starts flexing some muscles. "Amazing.... wow!". She pats her chest and she clearly can't hide her smile.
"Okay, now it's your turn" she says while picking up your head. Slowly she places your head down on her own body, which is lying on it's back on the ground. You get a sudden warm feeling beneath you, which you realize must be her body. As you stand up you feel flesh jiggling everywhere which is quite arousing. You look down at your new body and see breasts protruding from your chest, kept in place by a lacy black bra. They're looking bigger from your new point of vision. You lift up an arm and feel her, well, your chicken wings shake. It's a new feeling for you as you've always been quite keen on staying in shape. You look at your hands, the fingers are much shorter and less rough than yours used to be. You quickly scan down your entire body with your hands. You lift your breast with your hands, feeling quite exciting as you see them coming closer to your face. As you let them go, you feel them jiggling back in to place. Your hands go down to your belly, where you get a hold of her muffin top. You play a little with it, to annoyance of your sister. She looks at you ashamed. You then reach behind to feel your new butt. It's a lot more protruding than it used to be. Your hands almost disappear into in entirely. You giggle.
"Will you please stop that, I know I've not been taking good care of my body, but this is just gross."
You actually forgot your sister was there too, which makes you blush and you let go. You look at your sister, seeing your chest. You remember your sister is actually shorter than you are, so you lift your head up to look her in the eyes. "Sorry about that..." you say. "It's okay, but please don't do it again in front of me." "Of course I won't!" you tell her, but you're actually not so sure about that.
"So, what now?" you ask your sister.
"Well, I think we should..."