Does marital infallibility ( عصمة زوجية ) become affected by obsessive-compulsive disorder ( وسواس قهري ) and self-talk ( حديث نفس ) concerning matters that a person does not utter, such as thinking about the necessity of washing a cup from which he drank, or that this will affect infallibility?

Whispers (Waswas) are from the stratagems of Satan. And whoever has been afflicted by whispers to the extent of uttering divorce while not intending it, will not be held accountable for it. Turning away from whispers and not paying attention to them is the best cure for them. You must seek refuge in Allah and humble yourself before Him, and be constant in ذكر (remembrance of Allah) and increase it, for it repels Satan and is a fortress against his evil, and it brings tranquility to the soul. Be diligent in reciting the morning and evening supplications, and perform self-Ruqyah with the legitimate Islamic incantations. There is no harm in consulting trusted specialists in psychiatry.