The boys are originally happy to get the day off school, but soon realize they've made a mistake as the TV is still shut off as part of the punishment and they can't leave the house lest they be seen and reported although it won't matter, since Hal is bound to find out when he gets home anyway. Francis calls the boys about hiding an incriminating letter about his latest mishap on the academy involving a prank to a prestige university in Alabama and offers them assistance by suggesting an arcade where the owner doesn't bust truants. However, when the boys find out from Lois that they are grounded because Francis told her what they did with the bike, the boys refuse to cooperate with him. So Francis decides to get his lowlife pals to get the letter, but Malcolm creates a decoy letter for them to take and leaves the real one with Dewey who, to his horror, hides it under Lois' pillow, causing her to read it.
Would someone flick R5 off this site please? I'm currently rewatching the series for a paper I'm writing, and I have to say I understand where this speculation may come from, looking at 'MITM' as it progressed. I'm not sure about JB himself, but I think there's a case to be made for Reese being gay. However, by the high school years of Reese, I'd say this assumption can be called into question.