Why did Turbo Granny/Takakura do this??

I would dare say this is the ONE instance of fanservice on the manga (and I may get flagged for it) cause once you learn why Turbo Granny does the things she does to humans, which is to protect and avenge the souls of abused young girls and the fact that Takakura is a very awkward and respectful guy not just to Momo but to girls in general... why the fuck were they doing this? Couldn't they just have lifted her by the leg without pulling up the skirt? they couldnt just start to eat her from the head or something?

I would not DARE say this ruins the whole manga for me, but it does feel out of character for both TG and Takakura