子供 こども部屋 へや 使用 しようおばさんなら
kodomoe yamishiyō obasannara

Noun
Da Copula

The "-nara" conditional form ("if/when…") of 子供部屋未使用おばさん

1. If/When [it's] an unused children's room aunt.; ; Aunt with an unused children's room.

Nara Conditional