brother or sister of Sarabi

in the comic An Unusual Choir, young Simba and his parents visit the uncle and aunt of Simba.
Since Mufasa only had 1 brother, Scar, the uncle, or the aunt, is brother or sister of Sarabi.
What do you guys think? Is the male the brother of Sarabi, or the female the sister of Sarabi? Or do you have other theories on this?
Since Mufasa only had 1 brother, Scar, the uncle, or the aunt, is brother or sister of Sarabi.
What do you guys think? Is the male the brother of Sarabi, or the female the sister of Sarabi? Or do you have other theories on this?