Sister: You're adopted.
Me: At least they wanted me, they must feel terribly bad cuz they had to keep you :(
Adoption Comeback
Categories
Explanation
Experiment
The joke plays on the idea of adoption as a negative thing, where the speaker turns the insult around by saying that even though they were adopted, it means that their parents at least wanted them. They then take it a step further by insinuating that the sister was unwanted by their parents.