嫁姑 よめしゅうとめであれば
yome shūtomedeareba

Noun
Da Copula
no-Adjective

The "-eba" conditional form ("if/when…") of 嫁姑

1. If/when mother-in-law and daughter-in-law; If/when a mother-in-law and daughter-in-law exist

Ba Conditional