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Hello and thank you for using JustAnswer. Its impossible to predict the future as anything can happen and one's response to therapy is dependent on a number of factors, but to answer your question it is possible that with therapy these issues can be resolved. For some time your ex-partner was well-liked by your children and probably other people you knew, so something triggered this behavior meaning that the behavior can probably be treated and is not part of her ingrained identity. Now again though treatment truly depends on the effort she puts into it, so if she puts relatively no effort into her treatment than it is likely there will be next to nothing in terms of benefits. Still the use of therapy can be helpful in this instance if your ex-partner chooses to engage in such forms of treatment with you.
That is good and if she is willing to do therapy with you than it is possible these issues can be overcome.
You are most welcome. I wish you both all the best.