Lily was pregnant with her second child when Voldemort killed her. What's more, she was talking to James about making peace with Snape, and about making Snape her second child's godfather.

OMG I CAN'T EVEN

THE FEELS THE FEELS

WHY JK ROWLING SHE REVEALED THIS ON AN INTERVIEW

SO CRUEL

WHY

I'M DYING FROM THE FEELS

LITERALLY

HELP

I'M DYING

FEEEELLLLSSSSSZZZZZ

TOO MANY

NNNNOOOOO LILY

WHY DID YOU TRUST PETER

YOUR SECOND CHILD WOULD BE ALIVE

AND AND SO WOULD SNAPE AND SIRIUS MAYBE

OR EVEN DUMBLEDORE

WWWHHHYYYY

FFFEEELLLZZZZZ

FEELLZZ HEART ATTACK

I'M DYING

NNNNNNNNNOOOOOOOOOO