OoP : Sirius BIG question no-one has asked before (spoiler)

[tigerpatronus]

No: HPFGUIDX 66004

Crud. The tree got collapsed to the left. Drat. 
TK
> 
> 
>          mat gparents                      pat gparents
>               I                                 I
>               I                                 I
>           ----------                        ----------
>           I        I                        I         I
>  wife ---bro       My mom----------------My dad      sis-------hubby
>        I                       I                            I
>        I                       I                            I
>      my cousin 1              Me                          My cousin 
2
> 
> 
> TK