よめがかさがいだったら
嫁が笠貝だったら
yomega kasagaidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of よめがかさがい

1. If she married into the Kasagai family:; If she were to marry into the Kasagai family:

Tara Conditional
Usually Written in Kana