I’m mad that she didn’t correct him and is just letting him think he’s some unsightl...

maybe its something thats supposed to go down the family bloodline, cause his dad was also wearing the mask and his mom mightve never seen the fathers face

I think she already said it but then Erden just think that she's being good at him because she's a good person. The FL didn't bother to push him and just let him be.