For family reasons, I will need to pick my son up earlier than usual.
Due to family matters, I will have to pick my son up at 1pm instead of the usual time.
「家庭の事情で息子を早く迎えに行くことになった」＝ For family reasons, I will need to pick my son up earlier than usual. / Due to family matters, I will have to pick my son up at 1pm instead of the usual time. / A family matter has come up so I will have to pick my son up from school earlier than usual.
ボキャブラリー
family reasons/family matters ＝ 家庭の事情
need to/have to ＝ ～する必要がある
pick 人 up ＝ 迎える、迎えに行く
earlier than usual ＝ いつもより早い時間
instead of ＝ ～の代わりに
come up ＝ 出てきた
イギリス 
