yeah if what you want is to be dominated by the gadgeteer, then you don't have to buy the chastity cage, just walk around in circles and keep visiting her, after like 2 visits I think, she puts the chastity cage on you for fun, and then she puts a dildo up your ass I think. After visiting her more times she tells you something along the lines of "if you ever decide that's all you're good for, come see me." She is referring to getting dildos shoved up your butt, but yeah if you visit her again after she says that, she'll end up making you her pet and it's a game over