Avery did not expect Gustave to actually stop him.
In Baltimore, Gustave was famous for his indifference. Moreover, if he remembered correctly, Darlene's matter was related to Gustave's uncle, Douglas, so he would not interfere.
Douglas had done many illegal things, and Gustave would turn a blind eye to it even if it happened right under his nose.
However, Gustave actually helped Darlene.
Avery looked at the man's shirt that Darlene was wearing and suddenly understood she had easy virtues.
Avery did not want to have a conflict with Gustave. He didn't intend to fall out with someone who did business with him frequently. Avery would not do something like this that would not make up for the losses.
Avery grabbed Darlene's wrist and walked out without any explanation.
Gustave watched from behind and became calm again, not saying anything else.
Gustave had done enough today.