Ending a sentence with に


Looking the に particle up on jisho.org, it says that it could also function as
a because of~ or even for the purpose of~ but I'm still uncertain if that's
the case in the following sentence:

> 二人で歩み寄って許し合える関係に

I think it means "Meet halfway for your relationship to be one where you can
forgive each other." but I still don't know how に functions in this sentence.

Is the sentence incomplete by any chance? Or is it already grammatical by
itself?

