義理 ぎりのお にいさんではありませんでした
girino oniisandewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 義理のお兄さん

1. Was not my brother-in-law.; Was not my fiancé's/husband's older brother.

Past/Perfective
Negative
Polite
Formal Register