they're siblings through their father. he's a british man, very wealthy. born and raised in london. he spent a few years in the states and that's when he met ethan's mother and briefly married her. they divorced with ethan was two. dad moved back to london and ethan's mom raised him in maine. i'd originally planned for his sibling to be younger than him via their father's second marriage which also tanked at some point. but anyway, i kind of see them has having a sibling rivalry to a degree. who has dad's attention and who can keep it.