A Mother's Threat

This is how my mom always threatens me: "I brought you into this world, I can bring you out of it too." That's why I only have 2 siblings left.

I wonder where the bodies are?

Explanation

Experiment

The humor is based on the dark implication that the speaker's mother has actually killed their siblings, which escalates a typical parental threat to a shocking and morbid level. The line about the bodies adds to the dark humor by suggesting a real, albeit fictional, scenario.