When my parents sleep, I'm going to use their rent money.
Are you going to steal your parent's rent money? That sounds like it will end poorly.
I've already thought it through. It would be like my parents owe me money, since I'll pay them back later.
You shouldn't steal from anyone but especially not your parents. Don't do that to them.
I have the best intentions! Come on!
If you need money why not try asking them? Stealing from your parents will betray their trust and they may have trouble trusting you in the future. Try talking things through first so that your relationship can stay intact and work out a plan to pay them back.