"Financial Difficulties" joke

A man and his wife are having serious financial difficulties, so they decide that she'll become a hooker.
Not quite sure of what she's to do, her husband explains that she's to stand in front of the bar and pick up a guy. "Tell him it's a hundred dollars. If you have any questions, I'll be parked right around the corner," he says.
She stands there for a few minutes when a guy pulls up and asks, "How much?"
"A hundred dollars," she replies.
"All I have is thirty," the guy says.
She tells him to hold on, runs back to her husband and asks, "What can he get for thirty dollars?"
"A hand job," her husband replies.
She quickly runs back and tells the guy that a hand job is all he can get for thirty dollars. He agrees and she gets in his car.
He unzips his pants and out pops an enormous penis.
She stares at it for a minute, eyes popping out of her head, then says, "I'll be right back."
She races back to her husband and asks, "Honey, could you loan this guy seventy bucks?"