Can whoever pointed out Leizi is Zuo Le's aunt point out where in the voicelines is indicated as such?
I can only find one voiceline where Zuo Le's name is mentioned and she's just worrying about how Zuo Le is doing and the way he handles issues.
The second part of the voiceline is just her asking Doctor why is he looking at her a certain way and she just says she promised 义姐 that she would keep an eye on Zuo Le so that's why she's worrying about him. Literally nothing about aunts.
义姐* means non blood-related sister, or some friend who she has a close relationship akin to sisters, but I don't know who's she referring to.

This is not related but her idle line is kinda cute