An exercise in Bayesian thinking:

Someone comes to you and says they have been sexually abused. OK. There's a base rate of false accusations, and a base rate of real ones, so you have some prior probability p.

• Then they tell you that the abuser also hacked all their devices and got them banned from the entire internet.
• And then that the abuser and several confederates illegally excluded them from a will
• Then they tell you that they have anxiety and they moved house 20 times in the last year
• Then they tell you that they dropped out of medschool and can't hold down a normal job
• Then they tell you that they recorded a podcast with the abuser
• Then they tell you that the abuser offered to buy them a house, but they declined because they "wouldn't feel safe"

You look at the symptoms of psychosis:

Suspiciousness, paranoid ideas, or uneasiness with others

Trouble thinking clearly and logically

Withdrawing socially and spending a lot more time alone

Unusual or overly intense ideas, strange feelings, or a lack of feelings

Difficulty telling reality from fantasy

Sudden drop in grades or job performance

And the time of onset:

Psychosis often begins in young adulthood when a person is in their late teens to mid-20s

All this extra information you received after the initial abuse claim seems to be evidence that is quite strongly predicted by the psychosis hypothesis.

Now there's an alternative explanation that the abuser really is doing all of these horrible things. But the more of them there are, the weaker the "it was real" hypothesis gets, because each extra thing that the abuser does is an extra burden for reality (like, the abuser has to actually ban this person from the entire internet without any of the other people who would be involved in that divulging details) but there really isn't any limit to the amount of stuff someone with a psychotic delusion can come up with.

Also things like "I was offered a house but I didn't even want to meet because I was worried that the lawyer would control me" are quite strong indicators of someone not thinking rationally.

https://my.clevelandclinic.org/health/diseases/9599-delusional-disorder https://www.nimh.nih.gov/health/publications/understanding-psychosis