> but the costs of therapeutic interventions can run into tens of thousands of pounds.
More like hundreds of thousands. Courts have no limit on what they can order and they often order expensive, private therapeutic schools. In my case, I estimate about $150k per year in therapeutic expenses has been ordered by the family court presiding over my case. Mostly in the form of a few private schools. I'm in support of almost all of it, fwiw.
> Parent: "No, I was actually hurt by this person."
There's nothing wrong with talking about being hurt by your spouse to other adults (though- family courts may order that you can't!). The problem here is talking about it with your children in an inappropriate fashion, such that it damages their parental relationships.
Doubly so when the events never occurred, or when the parent accusing is actually the parent doing the abusing.