Jenny's question prompted the system once again for Jeff. He made a simple change to her body, making her unnaturaly flexible and stretchable to the point that one would wonder if she had rubber bones. He also made her able to be squished and molded into new shapes too, but while still keeping her human body fully intact. For now, this was enough for him as he could work with this for quite a bit.
Jeff surprised Jenny when he grabbed her neck and forcefully bent her back 180 degrees flat so that her head now rested upon her own ass. He then used her legs and looped them under her arms and tied them into a knot in front of her belly button. He then did the same for her arms, tying them up as well, just now beneath her boobs instead. With her arms and legs inter twined and tied up, Jenny was securely folded in half and bundled up into a neat pile of herself.
Jeff picked her up and shoved his cock into her mouth. Jenny didn't argue and began sucking without hesitation as she felt her pussy drool begin to flow down her ass and drip onto her face as her arousal grew and grew. She was more surprised her mouth could open wide enough to fit Jeff's cock.
Jeff then lowered the chair a tad before moving back to the desk and opening up the computer to watch a few videos. This left Jenny bundled beneath the desk on his lap, with his entire shaft literally shoved down her throat. She could still breath due to her body's new flexibility and stretchyness, but that was about it. While the videos played, Jeff began toying with Jenny's pussy with one of his fingers, causing her to moan and squirm while still helplessly impaled on his cock. Jeff eventually came after about 10 minutes of this and then proceeded to unbundled Jenny.
"Woah, what did you do to me? I'm like all bendy now, Jeff." Asked Jenny while she twisted her upper half 3 times around, bent backwards and then raised her upper half up after passing through her legs. Jeff smirked and pinched her nipples before pulling on them. Jenny squealed before moaning as her breasts stretched off her chest and her nipples stretched to become as long as pencils.
Jeff adjusted his grip, now holding her nipples in either hand like a pair of thin handles and began swinging his arms up and down. This caused Jenny's stretched out boobs to stretch out to over 8 feet in length, then begin bouncing in a wavy pattern.
"God Jeff, my tits are not supposed to be a replacement for a battling rope workout!" Laughed Jenny as she watched the absurdity play out before her eyes. She was glad that Jeff was seemingly enjoying himself quite a lot though, so she didn't really complain too seriously about being used like this. It felt pretty good too, especially when her boobs got slapped against things. Be it the floor, the chair, or even her other boob, it all felt good to her. And the thought that she was being physically used to help her boyfriend maintain his strong body satisfied her to no end.