I'm the villain who sets off my sister

Just because I took a bite of last night's leftovers.

My sister suddenly had a revelation, staring at me as if she'd discovered something groundbreaking:

"Do you really think this is safe to eat?"

I glanced down at the ribs Grandma had cooked last night and nodded, somewhat bewildered.

[No sympathy for those who bring trouble upon themselves!]

[If you're so fond of leftovers, just go ahead and eat yourself into oblivion!]

Later, I realized I was the troublesome sister in a kind of melodramatic story, quietly enduring hardships.