People ask what happened, and they want a fight, a betrayal, some incident that explains two years of not speaking. Sometimes there isn't one, you and your sister lived in the same house for eighteen years and never became friends, and nothing much changed when the calls stopped because there weren't many calls.

Two sisters can spend forty years believing they just never got along. Some of what each of them believes about the other started with their mother, in a house where one girl was the responsible one and the other was difficult, and neither of them was old enough to ask whether that was true.

There was no final argument, nobody sent the message explaining why it was over, you just started talking less and then the time between conversations got long enough that whoever called first would have been making a statement by calling. Plenty of sisters end up here, no falling out, no last straw, both of you doing a little less every year until there's almost nothing left to keep.

The title carries the primary keyword in front and the emotional hook behind it, which should hold up in a Pinterest overlay as well as in search. The slug drops "you both stopped trying" on purpose, since the searcher's language is closer to "sibling estrangement no fight" than to the framing of the piece.