A giantess punishment

How is this possible? you would say, while you were at home, just sitting in front of a Youtube video. And now... naked? and under sheets? with... Megan? who's a giant??!!!!
Wait, what is she doing?! ...
This is what happens when you refuse to give the answers to the math test. That girl in your class is very resentful and plans to make you pay for being selfish.
Divided between fear and pleasure, this situation is totally crazy!