Meaning of すぐ in this sentence


> Daughter: 「だって、じゃあたんざくの意味がないじゃん」  
>  Daughter: But, in that case tanzaku are meaningless aren't they?  
>  Dad: 「いいのっ」  
>  Dad: It's okay  
>  Daughter: 「なにさ、おとうさんは **すぐ** いいのって言うんだから」  
>  Daughter: What! Because you say it's okay?

I understand すぐ to mean soon/immediately etc. I can't understand what it means
in this context.

My guess it that it adds the meaning 'just' as in "am I supposed to believe
it's okay **just** because you say so?". But that's a complete guess and the
link with 'soon'/'immediately' seems very tenuous.

If further context is needed, these lines follow immediately after [this
question](https://japanese.stackexchange.com/questions/46770/is-%E3%82%93%E3%81%98%E3%82%83%E3%81%AA%E3%81%84%E3%81%AE-
rhetorical-and-other-conversation-nuances):




「すぐ」, in this context, means " **readily** ", " **very easily** ", etc.

If you do or say something habitually without thinking, we say you すぐ do or
say something.




「すぐ」, in this context, means " **readily** ", " **very easily** ", etc.

If you do or say something habitually without thinking, we say you すぐ do or
say something.

