Its possible maybe he owed the dealers inside 4k
Then why did he turn so sour and rude? Withdrawal symptoms!
He may have believed that he was in control and this person was so much on HIS side that she would do anything for him . Her surprise turn around would have thrown him. It wasn't a situation he was accustomed to, he didn't know how to respond -adults would discuss and hopefully come to compromise, but emotionally, at least, he'd probably never got to be an adult- so he resorted to rude and childish behaviour. Interestingly, those are the behaviours he MAY have used on his parents when THEY questioned his need for money "loans."