Loki knows he's adopted

a jotunn named Bestla and his father aesir they had four children Fárbauti, odin, Vili, and ve. Fárbauti was married off to Laufey who already has two sons. Thor loves his aunt and is excited to have a cousin close to his age but war break out and when Fárbauti gives birth to a runt she tries to save her child but is gravely wounded by Laufley on her death Odin promises to take care of her child as his own.