Petunia Montgomery is a background character from Traffic Lights. She was never mentioned in the first film,
however in the sequel.
She was similar to Julia, but not as worse, however she was obsessed with spending money, she even spend Delaware's money without asking his permission and often hid his stuff. He divorced her because she her behavior was beginning to be disfunctional.
Unlike Del's first wife, Petunia was never nice initially, in fact she always has been this way. She is very rude because she only cares about herself, she had no interest in anything what Delaware would discuss with her.