You pressed the button and Keenan felt something and put her hands on her behind and said "Holy, I can really feel that remote working..." she turned around a little showing you her butt which was starting to grow and push her hips out. Still holding down the button her butt tore her jeans and Keenan replied "that's a bit much don't you think?" as she hunched over trying to keep her center of gravity. You kept your finger on the button and her ass was around the size of watermelons and Keenan said "Really you can stop any time... getting kind of hard to stand."
You responded with a finger on the trigger by saying "Well why not just take a seat?" slightly smirking as she fell on her large cushioning ass. Those cheeks continued to enlarge until Keenan looking unamused was sitting comfortably on top of her ass. You asked "Comfy?"
Keenan said "You know sure the flesh is rather nice and comfortable to sit on ignoring the nerves on my ass. However now it's my turn." You handed her the remote and she looked and quickly found her decision.