She's pretty obviously Bonney's mother, 99.9% chance of that being the case, pretty much zero percent chance she's Luffy's mother.
Celestial Dragons see regular royalty as just other human slaves though...Charlos tried to and would have captured Shirahoshi if not for the Grand Fleet/Mjosgard, and Garling literally kills a king this chapter with zero regard whatsoever.
I know people are speculating that she's Bonney's mother, but that doesn't make a whole lot of sense. Kuma became the King of Sorbet Kingdom, which means he married the former Queen. When Bonney infiltrated Mariejois, she aged herself, and ended up looking exactly like "Connie" who was the current Queen of Sorbet Kingdom. So Jinny would have to be Connie's daughter in order for her and Kuma to be the former King and Queen of Sorbet Kingdom. (Connie reassuming the role, once Jinny died) That's poses the question as to why a Princess was kidnapped by the CD's and was made to become slave.