Lucas is left heartbroken, but the experience serves as a crucible for his character. He moves from being simply the "guy who plays video games next to the crazy guy" to a fully realized character with his own tragic history.
If you were looking for the computer command Ctrl-Alt-Del itself in relation to a stepmother (perhaps a joke about "deleting" a stepmother from one's life), that would be a play on words using the "Task Manager" function to "end the task" of a problematic parent. However, given the phrasing, the webcomic storyline is the most common cultural touchstone for this specific combination of terms. ctrl-alt-del: stepmom
The original run of Ctrl+Alt+Del concluded in November 2012, effectively ending the narratives for the core cast, including family-related subplots. Buckley later rebooted the series as Analog and D-Pad , an alternate universe featuring the characters as gaming-themed superheroes. Lucas is left heartbroken, but the experience serves
The relationship eventually runs its course, ending in heartbreak. The conclusion of the arc sees Rebecca leaving. It isn't a "happily ever after," nor is it a slapstick punishment. It is a mature realization that some relationships—regardless of the feelings involved—are too complicated to survive the reality of social pressures and family history. However, given the phrasing, the webcomic storyline is
Here’s how I interpret that concept, along with a few angles you could take for a strong paper or narrative: