I noticed your request for a review so here I am.
Title: seems appropriate.
Premise: is believable.
Imagery: we have some good descriptions of where he is and what he's doing and what time of day it is.
I kind of feel like we got an information dump rather than let us see things gradually as we go along.
However, if it adds a feeling to the scene it's needed.
Maybe the sun is so bright that a reflection shines off something in his room and into his eyes.
Maybe there's pollen in the air causing his eyes to water and making him sneeze.
His throat might be parched and drinking something shoukd help with the sneezing and dry throat. And so he heads out to the kitchen.
Any irritatant can add mood to the scene. Kind of like foreshadowing which is a great tool for bookending the scene or story.
* You need to add a line space between paragraphs.
* I noticed a lot of sentences started with "He". You might like to change that part by combining sentences, which serves two purposes. It allows use of imagery, plus it shows him doing something. It makes your story more concise.
Here's what I mean. I added some corrections but didn't combine any sentences, which I mentioned. Just vary sentences so it's not rapid-fire same rythm sentences :
(He)sighed,rubbed his forehead to make the migraine disappear, but to no avail. (He) yawned, stretched in the rainbow-colored hard(-)back chair, and shut off the medium-sized silver and gray radio that rested on the right side of the desk. (He) flipped his dog-eared math book shut and stood up. He walked to his bedroom door, opened it, switched the light off, and walked across the second-floor hallway to the U-shaped stairs. Camden descended(.)
* Dad mentions meatloaf lunch, but previously in the story it was said that it was already in the the afternoon rather than mid-day.
Still, I like that they will prepare something together. Maybe this is where it could be mentioned briefly that Hilda (example name) is absent and out grocery shopping or whatever it is that she might do outside of the kitchen.
Comments: This is okay for a rough draft to just get the story idea down. Then edit it, revise, then if necessary edit it as many times as you need to.
If they live in a mansion wouldn't they have hired help (a chef or kitchen worker?) who might normally be in the kitchen, but for some reason they are not there? And so Camden is left to help himself.
What I liked:
A÷ It's a strength that you know how to do dialogue correctly.
I liked the way Dad handles it. I thought grandad was a bit too harsh. Yes, he had a taste. He got curious. He even said he was sorry.
He's 14 (fourteen) years old, which is too young to drink, but he's curious about what the adult me are doing noticed his grandad does. Gramps isn't exactly setting an example, but hey he's an adult.
And it wasn't stealing, but you would think it was the idea that he got caught sampling his grandad's beer.
Labeling him a lifetime thief is rather unkind.
I guess there are crabby old grandpa's, but I'm betting there's some that would rather let them have a tiny sip in front of them, and once they do they wouldn't like it anyway.
Hope this helps.
Keep at it.