How to say "a very adult answer for a very adult question"?


I watched Vladimir Putin do Q&A with high school students. One asked him

> What event most impacted your life?

Putin gave a very genuine answer related to the collapse of the Soviet Union
that went way over the head of the 16-yr old. He then apologized and said:

> Forgive me. A very adult answer for a very adult question.

Is it correct to say:  
大人 **的** な質問 or 大人 **みたい** な質問

and would the whole translation be

大人的な質問によって、大人的な答え、すみません。




My personal recommendation would be to use the slightly colloquial 「オトナ **な**
」 with 「オトナ」 in katakana.

I am sure that is not a word taught in Japanese-as-a-foreign-language, but I
feel it would fit the situation well.

「大人的{おとなてき}な」 sounds way too stiff and 「大人みたいな」 sounds unnatural for using
「みたい」 because President Putin actually **_is_** an adult.

> 「ゴメンね。非常{ひじょう}にオトナな質問{しつもん}に対{たい}する非常にオトナな回答{かいとう}だったようだ。」




My personal recommendation would be to use the slightly colloquial 「オトナ **な**
」 with 「オトナ」 in katakana.

I am sure that is not a word taught in Japanese-as-a-foreign-language, but I
feel it would fit the situation well.

「大人的{おとなてき}な」 sounds way too stiff and 「大人みたいな」 sounds unnatural for using
「みたい」 because President Putin actually **_is_** an adult.

> 「ゴメンね。非常{ひじょう}にオトナな質問{しつもん}に対{たい}する非常にオトナな回答{かいとう}だったようだ。」

