A Storm in the Family ( an OC son of Petunia Evans)

In a world where the wizarding world and the realm of Greek mythology coexist, the lines between magic and divine power blur. Petunia Evans, after an unexpected affair with Zeus, gave birth to Damian Evans, a son who is part human, part god, with powers that far exceed those of ordinary wizards. Although Damian's heritage remains a secret from everyone except the gods, he's grown up in a quiet, somewhat ordinary life with his mother, Petunia, who struggles with her past choices, her jealousy of her sister Lily Potter's perfect life, and her hidden feelings about her son's true nature.