It’s interesting that at least some of TW’s family didn’t necessarily believe in his illness long before the unlikely symptom-reversal claims made in TSP and its sequels. His parents did believe he was seriously ill, and it probably contributed to them not reporting the theft, but others thought he was faking.
Which suggests a longtime pattern of behaviour of feigning illness, or exaggerating a minor/indolent condition, as a form of useful alibi for not being held accountable for your actions.
‘I can’t work because I’m ill.’
‘You can’t go to the police about my wife, because I’m ill and it might kill me.’
’It’s extra-poignant and book-worthy that I’m homeless and walking the SWCP because I’m ill.’
’It’s ok to steal fudge and campsite stays because I’m ill.’
’I can’t make your cider because I only have two months to live.’
‘It’s vile and inexcusable for a journalist to question my illness because I’m dying.’
And not just TW’s illness, if SW was feigning insanity and pretending to hear voices and hallucinate whenever her mother in law tried to talk to her about the missing money.
Presumably they shelved SW’s MH issues for the purposes of publishing TSP and its sequels, the film, attendant fame, media appearances etc because they needed a frontwoman, and TW looked too robust to be credibly at death’s door, and besides, publishers signing an author, people booking events/ readings /Arvon tutorships, Gigspanner etc don’t want someone hallucinating all over the This Morning sofa or whatever.
But I wouldn’t be surprised if SW’s MH issues re-emerge now that it might be useful to be able to present herself as suffering from debilitating compulsive thieving/spending and being too fragile to deal with questioning.