Sure, taking common sense and laws into consideration they cant do much. But thats not the reason, is it?
Seriously, like, Kasane mindset is wrong 80% of the time. She often disregards Meguru feelings with what she assumes Meguru is feeling. Not saying is completely absurd to think Meguru is confused since Meguru is immature and naive, but she would would do the same regardless.
She started all this because she likes Meguru, she went to the depths of despair and made absurd decisions to stay with Meguru and when she finally reaches her initial goal she simply decides to back away saying she cant or that Meguru dont really wants that? No much talking, just her one-sided feelings again.