For the people who don't know anything about Kit, she's partially disabled.
She has degenerative disc disease, spinal stenosis, scoliosis, and some nerve damage. Basically, her spine is all sorts of fucked up and she has to use a wheelchair sometimes.
Just mentioning this to add a little more context whenever she complains about back pain which she does a lot in this vod, it's not because she has huge tits (though she's said she does). Kit can't really do many positions as a result.