Recently, he hasn't been getting his room as clean as you prefer. While you don't want to make a huge deal of it, he does have numerous animals housed in his room, and some of them have a habit of kicking cage material onto his floor. Today, you told him very specifically that you wanted him to do a couple of extra things on his room. You detailed what you wanted done and made sure he knew he was to do it before his friend arrived. To help out, you assigned some help to a couple of his animal chores, so it wouldn't take much extra time - maybe five or ten minutes more than normal.
Eddy was coming over to practice some musical duets. About thirty minutes before he was scheduled to arrive, you specifically asked Van if he'd finished all his chores. When he said yes, you specifically asked about the extra chores, and he repeated yes.
Now, you just took some laundry to his room and found that he not only disobeyed you, but lied about it. The trouble is, Eddy has already arrived. While Eddy technically knows that you use CP, he's never been around when Van received it.
Well, you decide. Van's twelve years old now. He'll know what's what, if we handle it this evening, after Eddy has departed.
A couple of hours later, Eddy and Van come up to you.
"Dad, can Eddy spend the night?"
You like Eddy, and you have no trouble with him staying over, but when are you going to apply that owed blistering?