RICHIE DIMASO: What, did you try to dress me so I would look like him? EDITH: GREENSLY No, you’re not dressed like him, all right?
Richie is an FBI agent and doesn’t want to be associated with the con artists Edith and Irving. When Richie thinks that Edith dresses him like her partner he feels used, and is insecure because he is falling for Edith. Though he doesn’t trust Irving, when Irving insinuates that Edith is dressing them the same he is so nervous that he is becoming a con artist himself. He wants to believe he is better then them, but starts to doubt himself that he is becoming “like him”, meaning Irving.
Edith’s responds to Richie with urgency as she starts her sentence of with a direct “No”. Edith’s real name is Sydney Prosser and she is living a lie, in order to scam people’s money with Irving. She tries to validate herself whenever she can, in order to be believed as Edith, a British aristocrat. Sydney balances Irving her partner in crime, who she’s in love with, as well as leading on Richie, the cop, in order to not get arrested.
The entire idea of Edith dressing Richie like Irving shows the underlying theme of forgery, and scamming. Richie feels this need to find the truth, where Edith feels a need to cover it up. Not only does she convince herself of the falsies, she questions others believes in the truth, strengthening her own lies. Edith has a lot of power in this situation, because her identity is unknown by Richie, and both men love her. She still has to be extremely cautious because if she angers Irving he could expose her true identity; if she angers Richie he could have them both arrested.