"It's my time, I've earned it"

The evening on the sofa is yours. The day was other people's, and the hour after the kitchen is the one hour that isn't, and if you want to spend it on three episodes, that's the point of having earned it.

An earlier book in this series is about exactly this, staying up late for time of your own, and its argument is worth borrowing. The need for time that's yours is real and not to be argued with. What's worth arguing with is the method, which is taking that time out of sleep, and the book's evidence is that time taken from sleep is paid for the next day at a rate that makes it poor value. I'll refer you to it for the sleep side and take one narrower point here.

The half past nine version of your time and the twenty to midnight version are different hours. At half past nine you're awake, the episode is chosen, and the pleasure is the pleasure of a good drama watched by someone who wanted to. At twenty to midnight you're tired, the episode was chosen by a countdown, and the pleasure is the resolution of a cliff you didn't ask to be left on, followed by forty minutes you'll barely remember. The first is earned time enjoyed. The second is earned time spent, by a timer, on something that costs you tomorrow.

"I've earned it" is a claim about the first hour and it's true. The overrun isn't what you earned. It's what autoplay charged you, and the currency was the morning. If the evening is yours, the way to keep it yours is to be the one who decides how long it is, and chapter 22 is about an end time that's yours as well.

There's a version of this belief that's about fairness, that after a day of other people's demands you're owed something, and the something is the sofa for as long as you like. I'd only say that owed and enjoyed are different things, and that the third episode is owed and not enjoyed, and that the person you're taking it from is you at seven in the morning.