I´m cynical that therapy can ever change toxic people such as your mother, fundamentally. Therapy cannot change a person´s personality or their character traits. What you describe she said about your wedding day
, seriously, THAT alone would make me stay NC forever more!
Unless someone had a drink or drug problem which they´ve since sought help for and are ¨recovered¨, I may just reconsider letting them back into my life, just to see....But from what you say about her ( and I´m sure you´ve many more examples of appalling treatment and behaviour ), this is her personality and she will never change.
What are the ¨life-changing events¨ you speak of? If she had changed and wanted to apologise, why would she wait until you´ve coincidentally had some life-changing event??
It´s a load of old bollocks. And you´re getting carried away in a daydream about The Perfect Mother ( through no fault of your own ) and doing what plenty of us do, fantasise about ¨what would it be like?¨......¨Wouldn´t it be nice if...?¨ I get like that at Xmas-time usually, but I would never let amnesia set in and forget how horrid and dysfunctional my ex ¨mother¨ was/is!
She´s trying her luck, trying to wheedle her way back in, I think anyways. Don´t be caught off guard and let curiosity get the better of you. It could be your downfall. She´s had ample opportunities to see the error of her ways and apologise.....why now? She´s magically transformed into the Waltons-type mother? Or Linda Bellingham off the Oxo ads?? Not likely....But I´m cynical and I will remain that way.