One of the most important things you can do PeaceLilly is stop defending yourself. Not only because doing so in your case enables your D to cast you as the bully and her as the victim, but also because it helps to frame your own mindset.
The only and simplest defence against lies is 'I am not responding verbally or mentally to the lies that are being told'.
If a third party repeats your D's false accusations, a good response to what she's said is 'did she', and if the subject's pursued 'I'm not responding to lies'.
'The only way to win the the game is to stop playing' so refusing to engage in conversation about the lies hopefully in time, silences them. When your D and/or anyone who believes the lies realises they're not going to get a response or reaction to them from you, they will see there's no point in bringing them up.
The inner turmoil and hurt will take longer to begin to diminish because it is awful when you know lies are being spun.
Think of a swan, gracefully gliding across the water with all of the hard work to swim across happening out of sight. Your D and others will see the swan on the water, they wont see how hard you have to work mentally, to keep your emotions in check as you refuse to give the lies any possible credibility by acknowledging them.
You're doing well, much better than you probably realise. Unless there's reconciliation, this estrangement is something you have to live with for the rest of your life so it's important to remember that there is a life after estrangement.
It certainly doesn't feel that way in the beginning, and there will inevitably be times when no matter how long you've been estranged, the pain and grief will feel overwhelming but you're not alone, and I know that for Mr. S. and myself and for many others, there's comfort to be found in knowing that
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