Actually, She's lying to protect her sister. She doesn't want him to know that her sister has involvement in finding him or she may be killed. Wouldn't he want to go question the sister instead? What would the sister think knowing that the child she picked up is a man at night? Wouldn't she freak out and kick him out? She's lying to protect them both. What would she get benefit from? She doesn't want anything to do with the Male lead or her sister/or her will die. It isn't like she's lying to make the Male lead have a good impression of her. All she's doing now is just trying to avoid being killed, Not making him like her. The Female lead is the one who named him Nox. The sister just agreed with it. Even if the sister originally named Nox, She did this time so it isn't lie at all. You're really trying to make it seem like she's a liar who wants something from it when she just wants to keep her sister and herself safe from dying.

Its like she was trying to take credit for finding him and "naming" him, even tho this is what the sister did?
it starts off with a lie and when she named him, that was already a redflag bc the sister was the one that was supposed to do so.. then LIES again saying she found him??? like geez just be upfront about this..
she tries to justify lieing so her sister wouldnt die but it feels like its all for her own benefit instead :/
this kid is innocent and has been abused and she continues to lie for her own gain. i just hope it gets better bc rn i dont have a good impression on this lead.