Fauxmily
Family of choice, not typically genetically related to each other; family dynamics of parental roles and sibling roles are typically represented.
We're taking the fauxmily to Disneyland for vacation. Care to join us?
Fauxmily
People who you grew up or with or know that you called aunt or uncle or cousin or some other family relation name when they're are not a blood or lawfully related person.
Well I mean, she's not my "real" cousin, we're not related in any way by blood or marriage. You know, she's fauxmily, so it's not weird that we made out.