YOU SAID:

I couldn't fathom coming up with a better sentence, my sister can't fathom me thinking of a better one either

INTO JAPANESE

私はより良い文章を思い付くことができませんでした、私の妹も私がより良い文章を考えることを理解することができません

BACK INTO ENGLISH

I couldn't come up with a better sentence, my sister can't even understand that I think of a better sentence

INTO JAPANESE

私はより良い文章を思い付くことができませんでした、私の妹は私がより良い文章を考えていることさえ理解できません

BACK INTO ENGLISH

I couldn't come up with a better sentence, my sister can't even understand that I'm thinking of a better sentence

INTO JAPANESE

私はより良い文章を思い付くことができませんでした、私の妹は私がより良い文章を考えていることさえ理解できません

BACK INTO ENGLISH

I couldn't come up with a better sentence, my sister can't even understand that I'm thinking of a better sentence