Of course can be done. Pure and vanilla decrease corruption by 3 points a day and it´s not soo hard to rise corruption by more than this per day, and once you get the 30+ corruption you get her to the dungeon and it´s done. But for roleplaying considerations I prefer not to do it. It´s her thing, we have a deal, she keeps her part and I´m a man of my wordOh, it can be done, and someday you can end up with a Caitlin who looks like this: