In the Marvel Cinematic Universe, she fell in love with Ego the Living Planet, and conceived a son with him, Peter. However, Ego gave her a brain tumor that ended up killing her because she was an obstacle in his plans of universal conquest. Years later, the adult Peter, having become the superhero Star-Lord, avenges Meredith by killing Ego and foiling his plans.
In the animated universe, she instead fell in love with J'son, who abandoned her to fully dedicate his time to rule Spartax, and Meredith still died of unknown circumstances, but not before giving birth to a son, Peter, who again grows up to become the superhero Star-Lord.
In both universes, she is shown as kind, gentle, and loving, and her memory inspires Star-Lord to protect the innocent and vanquish the forces of evil.