When your kids' parents ask for money, it's time to break the rules.
I'm currently in the middle of something, so I'm afraid I won't be able to help you with that right now.
Hold your children hostage for more money.I have a deadline to meet, and it's not to pay off my own debts or fix my own broken appliances.
Pretend you need a deadline.I'm not home, and even if I were, I'd be too busy binge-watching my favorite show to care about your financial woes.
Claim to be on a vacation you're not.