Zhǎngnǚ chūjià hòu, jiālǐ shǎo le yī gè délì bāngshǒu.
After the eldest daughter got married, the family lost a capable helper.
Tips
usage
长女 uses 长 in the reading zhǎng (elder), not cháng (long). Compare 长子 (zhǎngzǐ, eldest son). The family-role compounds 长 + gender character are common in formal or literary contexts.