And then it occurs to you - your middle two sons, Clayton and Nolan, have pretty much become best friends with Tristan since you married Clayton and Nolan's mom ---
Leaving Tristan to finish getting ready, you go to Clayton and Nolan's room. You know he wasn't at the Malone's house recently when he claimed to be, but his cousins weren't there either. However, he's also admitted he wasn't at the Hathaways house a few days ago, when his cousins were there and said he was there with him. You tell them you know what's been going on with Tristan, and then you ask about him being at the Hathaway's house the other night, which they both told you about.
You've made it very clear to all your children (including... no, especially 8-year old Eli, who considers it his duty to tattle on his big brothers every chance he gets) that you don't want a bunch of snitching. If the others aren't doing something dangerous or illegal, you'll deal with it without there help.
This is a different case, however, since it involves a deliberate lie - active, not passive cover up.
Confronted with your knowledge, and realizing that they locked themselves into details that can be proved, they fess up. Tristan never asked them to lie for him. When he realized they'd been where he claimed to be, he just ask that they not mention it. It had been Nolan's idea to add to his cover story, and Clayton had gone along.
How far is the liar's fire going to spread? Are Clayton and Nolan just as guilty as their soon to be sore cousin? Can they be forgiven for trying to help a bro? Or is the real answer somewhere in-between?