Classify them as "Number 1", "Number 2" and "Number 3".
Now, suddenly a little girl comes out of nowhere, saying she's your future daughter with "Number 1"!
Then a little boy comes out of nowhere, saying he's your future son with "Number 2"!
Then ANOTHER little girl comes out of nowhere, saying she's your future daughter with "Number 3"!
They ALL came back to the past to make sure you'd choose their parent!
Which means no matter which you choose, 2 of those kids from the future WILL disappear and never have existed because you chose one.
Now, HOW will you handle this situation?