Its lowkey valid reaction tho given the type of trauma she's dealing with.
Forgot to add, it makes sense since the only memory she has of that family of hers were mostly negative, it was so bad she had to supress most of her childhood memories. So she would be suspicious if there was suddenly a family member that wasnt hostile towards her and is not used to change in the majority of her life
i know and tbh i hope the siblings actually end up in good terms because both of them for what we saw so far deserve to be happy they're both so traumatised
god i know haseol is traumatised but still i think she should start tearing the walls of “i have no family” cause tf you do (pls dont come at me 4 this) i love her but shes just confining herself in her void and it will absolutly bring her no good, also yeonwoo is a cutie i hope he can actually make the siblings talk it trough