I have come"-- with decision--"to stay with you!" "Eh ?" says the professor.

It is a mere sound, but it expresses a great deal.
"To stay with you.

Yes," nodding her head, "it has come to that at last.
I warned you it _would_.

I couldn't stay with her any longer.

I hate her! So I have come to stay with you--_for ever_!" She has cuddled herself into an armchair, and, indeed, looks as if a life-long residence in this room is the plan she has laid out for herself.
"Great heavens! What do you mean ?" asks the poor professor, who should have sworn by the heathen gods, but in a weak moment falls back upon the good old formula.