They'll Tell You She Got It From the Internet
Your sister sends you the article. It explains that estrangement is up because young people are on their phones learning words like narcissist and boundaries and toxic, that a generation raised to chase its own happiness is throwing away people earlier generations would have found difficult and kept, and that a lot of therapists now treat a woman's guilt about leaving as a symptom to be talked out of her rather than as information. You read it twice. It's the first thing anyone has handed you in three years that doesn't seem to think you're the problem.
That relief is the reason to be careful with it. An explanation that puts the cause of this outside your house is going to feel better than any other explanation available, and feeling better is not the same as being right, and it's definitely not the same as getting your daughter back.
Some of it is accurate, which is what makes it persuasive. Ruptures over politics did go up sharply in the last decade, plenty of families lost each other over an election and not over anything anyone did at home. There are therapists who move a client toward the exit faster than the situation called for. Language does flatten people, and a complicated woman with a temper and a hard life can get turned into a diagnosis by a daughter who found a word that fit and stopped looking. Any mother who says none of that ever happens is arguing with the weather.
The trouble starts when it becomes your whole account of what happened. If she left because of the internet then she didn't decide anything, somebody talked her into it, and once you believe that, her no stops being a decision you have to respect and turns into an error you're entitled to correct. That belief is underneath most of what estranged parents do next, the letters that keep coming, the messages routed through a cousin, the birthday package sent to an address she didn't give you. She told you what she needed from you. Honoring it exactly, rather than treating it as an opening position, is the only thing available to you that she would register as different.
And she can tell which explanation you're holding. It's the first thing she'll listen for if she ever does pick up, whether you have any account of the last twenty years that includes something you did. Not because she wants you humiliated. Because if you don't, then going back means going back to being told she's dramatic, and she's already decided she can't do that.
What most estranged daughters are waiting to hear is smaller and more specific than mothers expect. It isn't I'm sorry for everything, I did the best I could with what I had, which is a sentence that closes a subject rather than opening one. It's one thing, by name, with no second half. That you brought up the money in front of her husband at Thanksgiving. That when she told you what her marriage had become, you talked for eleven minutes about your own divorce. That you didn't come when the baby was in the NICU because of an argument with her father, and she was alone in that hospital for nine days. Say the one you actually remember, and then stop talking, and do not add that she was difficult too, because she was, and saying so in the same breath is how mothers lose the second chance.
There's a practical side to all of this that the articles don't cover. Relatives will urge you to hold firm, to not reward it, to change the will, and some of them are enjoying this more than they'd admit. Changing the will does not bring anyone home, it just guarantees the last conversation your family ever has about you happens in a probate office. Money is different from the rest of it, whatever your relatives tell you. If she's struggling and you're able to help, help, and send it plainly, without a note asking how she's been, without mentioning how long it's been, and without telling anyone in the family that you did it. What she'll refuse is money with a condition attached to it, the deposit that lands the week before Christmas, the offer that comes with a suggestion about lunch, the help that gets mentioned later as evidence of everything you've done for her. Showing up at her house, at her church, at her child's school event, ends whatever was left. The women who eventually get some kind of relationship back are almost always the ones who did the least, who sent one letter a year that made no demands and asked for no reply, and who did not treat every silence as an insult.
Be honest with yourself about the odds, too, because false hope is its own kind of trouble. Some daughters leave for reasons no mother can repair, over a husband, over religion, over a sibling's account of something. Some leave and come back within two years and everyone is quietly relieved and nobody discusses it. And some mothers did nothing that anybody would call harm and lost their daughter anyway, and I'm not going to tell you that never happens, because it does, and being told it's always earned is its own injury.
But the explanation your sister sent you asks nothing of you at all, and that's what should make you suspicious of it. Anything that lets you skip the part where you look at your own conduct is going to be popular with you, and it is going to keep you exactly where you are.
If you write anything this year, keep it to one page. Say the specific thing you remember. Say you won't contact her again unless she asks, and then don't. Put your phone number at the bottom in case she's changed hers and lost yours, and send it, and then let a whole year go by without sending another one.