A quick breakdown of how the pups see their familial dynamics.
Cadi: older sister/semi-parent, views Chance more like an owner than anything parental, occasionally acts as a something of a service dog (her choice, mutually beneficial to her and Chance). Legally had custody of Sable, Salem, and Genesis after she turned 21. Chance legally adopted her before she turned 18. Views Chance's kids as almost like cousins
Sable: views Cadi as her older sister (which she is) and Salem and Genesis as her younger siblings (they are biologically her niece and nephew but she grew up with them). Views Chance as more of an uncle and Vaughn as a brother in law. Views Chance's kids more like cousins, similar to Cadi.
Genesis: views Cadi as a mix of mom and older sister, Sable solely as her sister. Salem is her twin and she does view him as such. Vaughn is a weird mix of uncle and dad, Chance is a weird mix of dad and grandfather. She often refers to Chance as her grandfather only because, legally, that's his role in her life. Has a more complicated view of Chance's kids but is also closer to some of them than Cadi, Sable, and Salem. Some of them she views as siblings (Dahmer and Gacy especially), others she views more as cousins (IE Berk who is not as around). Occasionally refers to them as her aunts and uncles for legal reasons.
Salem: views Cadi, Sable, and Vaughn as siblings, Genesis is his twin and he sees her as such. Chance is the only person he recognizes as a parental figure in his life but still refers to him as his grandfather to other people because that's how he's listed on legal documents. Will say Chance's kids are his aunts and uncles but views them more as siblings and treats them as such.