Why did Patsy, while inebriated on tranquillisers or cognitively impaired from her terminal illness not disclose anything damaging?

Apologies if this has already been discussed but in her heavily medicated state, why was there never an instance of Patsy ‘slipping up’ and admitting anything? I understand she said some odd things during the dna testing she underwent but while inebriated to such a degree, why didn’t she divulge anything incriminating or was she flanked by John so much she didn’t have the opportunity to do so? Even as she began to “lose her mind” at the end of her life due to her illness (Johns words) nobody has come forward to say she admitted, without intention, recollection or understanding of doing so, that xyz occurred? I feel that someone who was close to her must know more