I’m she: what does the gentleman desire?

MEPHISTOPHELES (aside to her)

It is enough that you are she:
You’ve a visitor of high degree.
Pardon the freedom I have ta’en,—
Will after noon return again.

MARTHA (aloud)

Of all things in the world! Just hear—
He takes thee for a lady, dear!

MARGARET

I am a creature young and poor:
The gentleman’s too kind, I’m sure.
The jewels don’t belong to me.

MEPHISTOPHELES

Ah, not alone the jewelry!
The look, the manner, both betray—
Rejoiced am I that I may stay!

MARTHA