"I remember washing both of you up in the sink all those years ago and I always thought about how peaceful and relaxing that must be. Just having someone else lather you up, clean you off, dry you, all while you just sit back and relax. Would you be willing to do that for me?" She asked, eyes wide with anticipation.
Your sister and you exchange an awkward glance. Could the two of you really do this? You both sort of knew in the back of your minds that this would happen eventually, but you didn't think you'd have to deal with it THIS soon. Eventually Jessica responds "Of course we will, if that's what you want." She picks up her mother easily, cradling her in her arms. "Alright, let's go." She told you.
"I'll meet you two in the bathroom, I want to try one thing with the rapier first." You say. Jessica nods without questioning and proceeds to carry mom to the bathroom. You knew that the three of you would all have to be naked for this bath thing to work, so you decided that you should take a precaution to make sure that hopefully nothing weird would go down. You sit down on your bed and slide off your pants and briefs, unleashing your dick which had grown hard just at the thought of what might happen. "Sorry little me," you say yo yourself, taking a hold of your cock with your left hand "but I can't have you making things all weird with members of my family. I'm going to have to take you out of the picture for a little while." With that you swipe through the base of your whole package with the rapier. The sensation is pretty pleasant, and looking down you saw that your groin was now covered in smooth skin, which was sensitive to the touch (though not as much as your throbbing member which you still clutched in your hand.
Turning around you press the base of your detached dong onto the wall, removing its connection to you. You were now completely genderless, though a quick mental check showed that you were still attracted to girls. You slice your member off the wall, noting how it was still erect despite having nothing connected to it. You set it on your bed and you were about to pull your pants up when Jessica walked in.
"Hey bro what's taking so lo-..." She stopped, noting your complete lack of genitals. She looked up at you, tilting her head in confusion.
"Just a precaution. I took my part off and removed my feeling from it. Just in case... You know... Stuff." You awkwardly tried to explain, feeling like a huge pervert for having such thoughts.
Jessica goes over to the disembodied manhood and picks it up, absent mindedly inspecting it as she spoke. "So you can't feel this? It's just a brainless dick?" She asked. You nodded and she continued "Huh. That seems pretty smart of you actually. Make sure no funny business goes down right out of the gate. Props." She commends you, much to your surprise. "In fact, why don't you do the same to me? Take off my cleavage and crotch."
Your eyes widened significantly. "What, do you think you... and mom... and..."
She blushed and stammered "Well, uh, you know, she's... you know she's helpless right now, and... NOT THAT I'M INTO THAT... I just don't want to maybe take advantage of her... uh..." She trails off, trying to cover for herself.
You laugh and wave it off. "Say no more, we're both perverts and weirdos. We'll take about that later. For right now let's just get this done with." You say. Jessica nods, extending her hand out to you. You hand her the rapier and she gets to work, disrobing completely save for her socks before removing both of her sizable mammaries and her small slit, attaching them to the wall as you had to remove her attachment to them. She set her boobs and snatch next to your still erect dick, and the two of you spend a moment in silence appreciating the other's parts. After that you both head off to the bathroom where your mother is waiting on the floor, wrapped in a towel while the bathtub slowly filled.
"Hey kids, what was the hold up..." She looked the two of you over, noting the flat patches of skin where your fun zones used to be. "Why are both of you missing your junk?" She asked. You must be imagining thing, because she almost sounds disappointed.
"We just don't want you to have to see that stuff, make you feel all awkward." Jessica lied.
"Oh, uh, alright." She responded. A short pause, then "Well the bath sounds about full now, and I'm dying to get cleaned up!" She said more cheerily. Jessica unwrapped the towel and you saw that she was already naked, her body still looking young and fresh despite her age. Jessica submerged her up to her neck in the warm water, causing your mom to sigh contently and smile. The next ten minutes are spent lathering her silky smooth hair, soaping off her body and rear, and massaging her smooth arm and leg stumps, which if even comparable to how your own smooth skin felt probably felt like heaven to her. You and Jessica are about to pull the plug when your mom shouts "Wait, what about my chest and crotch? Just because the two of you took yours off doesn't mean mine don't need to be cleaned!" She said jokingly.
The two of you again exchanged a look, having hope that she hadn't noticed.
"I'll take bottom if you take top." Your sister said, trying to spare you some embarrassment. You nod, and begin sponging off your moms surprisingly firm breasts.