A fan fiction about Leo and Calypso after he came back to her at the end of Blood of Olympus. This is from the Percy Jackson series so I don't claim to have come up with all this.
Book 2 in the; Moiraio series Fem!OC x Leo Valdez
Now Kiera Jackson has finally figured out why she's different from her brother. At school, she has to worry about sticking up for another kid without getting expelled. Until she finds out it's another half-sibling of hers . . .