>>58096999But it didn't, she was the last of the Celesticas, her backstory confirming her family died while she was "gifted" long life when she accepted Arceus' mission. It'd also be pretty hard for a kid to just *stop* ageing, to adhere to their mother's ageing process, when they weren't chosen by God to aid the Champion destined to save Hisui.
Nah lad, Lucas saves Hisui, Cogita completes her mission by aiding him, then some time after the events of the game, Cogita marries (Cynthia's granddad's kicking about too), settles down has at least one kid, who then grows up to become one half of Cynthia's parental unit.