さてこそ

さてこそ

1 〔そうであってこそ〕 (and) that's (exactly) why….

●自分のことを犠牲にしても立派に子供を育てる, さてこそ親だろうが. Sacrifice yourself to bring up your children―that's the whole point of being a parent.

2 〔案の定〕 as expected; unsurprisingly; as a matter of course.

●彼女は帰国子女だったのか. さてこそ英語がうまいはずだ. So she's a returnee. Then she ought to be good at [That accounts for her fluent] English.