Stanley distrusts Blanche and believes she used the money from Belle Reve to buy fancy things for herself.

Stanley:
It looks like you raided some stylish shops in Paris.
Blanche:
Ha-ha! Yes – clothes are my passion!
Stanley:
What does it cost for a string of fur-pieces like that?

Stanley:
There is such a thing in this State of Louisiana as the Napoleonic code, according to which
whatever belongs to my wife is also mine – and vice versa.
Blanche:
My, but you have an impressive judicial air!
Stanley:
If I didn’t know that you was my wife’s sister I’d get ideas about you!