Greta and Valdin by K, Reilly, Rebecca

Valdin is still in love with his ex-boyfriend Xabi, who used to drive around Auckland in a ute but now drives around Buenos Aires instead. Greta is in love with her fellow English tutor Holly, who doesn't know how to pronounce Greta's surname: Vladisavljevic. From their Auckland apartment, brother and sister must navigate the intricate paths of modern romance as well as weather and the small storms of their eccentric Maori-Russian-Catalonian family. This beguiling and hilarious novel by Rebecca K. Reilly is set in a world that is deeply familiar (but also a bit sexier and more stylish than the real thing).