My SIL, Jayme, and I are bonafide, no-nonsense, full fledged sisters now.
We had our first big disagreement and argument - some flaring emotions were present also - and it's now behind us, we've moved on, and we're still SISTERS!
Not that we haven't disagreed before in the last 7+ years we've been in the same family, but those were little tiny things - like what should we eat and where should we meet, and silly stuff like that. We both felt strongly about something more important this time.
But, it's over now...and Jayme, I love you even more because we were able to work through that together!