Trying to help, Fanny puts up $20,000 so that Nick
can become a theatrical agent, but he sees through
her ploy and it angers and humiliates him. Desperate
for money, he agrees to participate in a fraudulent
bond deal and is arrested for embezzlement.
Fanny realizes that somehow she has driven Nick to this:

I add two and two, the most simple addition,
Then swear that the figures are lying,
I´m a much better comic than mathematician
´Cause I´m better on stage than at intermission,
And as far as the man is concerned,
If I´ve been burned,
I haven´t learned.
I know he´s around when the sky and the ground start in ringing,
I know that he´s near by the thunder I hear in advance,
His words--his words alone--are the words that can start my heart singing,
And his is the only music that makes me dance.

He´ll sleep and he´ll rise, in the light of two eyes that adore him.
Bore him it might, but he won´t leave my sight for a glance.
In ev´ry way, ev´ry day, I need less of myself and need more him--more him,
´Cause his is the only music that makes me dance,
´Cause his is the only music that makes me dance.