Family Feuds

I've had a huge argument with my only sister whom i love more than anything[and her husband] a few days ago, about something that we just can't see eye to eye on, even the situation itself! They are upset about one part of the situation and we [Both John & i] are upset about another part. They can't understand our hurt & we feel that what they are upset about isn't part of the problem. Other than, I said something horrible to her when i felt totally disregarded by her, that i knew would cut. I can't take it back, but i don't think it's worth losing a sister over. They feel hurt, we feel hurt, and i just don't see a happy ending :o(