Call this a gut feeling, but I think he's stepped outside of his marriage and is laying the foundation here for blaming his lack of judgement on alcohol. I don't think anything physical was involved, but I wouldn't be surprised if he's been exchanging messages with other women via some sort of social media.
I have no evidence to back this up, but as soon as I read his most recent round of self-congratulatory autofellatio, I had such a strong feeling that there was someone else involved.
Some huge majority of couples whose child has a catastrophic illness end up separating, even if their relationship was very healthy before. The stress of constant caregiving for the remainder of a child's life, the ongoing financial devastation from both episodes of critical illness as well as addressing the day to day physical needs of a profoundly disabled child, the isolation that arises because other parents no longer know how to interact with someone whose child no longer has anything in common with her age peers and serves as a grim reminder that they, too, could lose everything in the blink of an eye, trying not to completely neglect the well-being and education of the healthy kid on the family...it all takes its toll. There is never really any down time to just be together or talk about problems as they arise, because a child with needs as severe as Eva's need 24 hour care, so those little ways we all have of checking in on the health of our relationship are abandoned out of necessity, and suddenly you're married to a stranger and the life you had envisioned for the two of you after your kids were grown up and gone will never happen. The odds of a relationship failing go up even further if the child dies, and in a way, they're grieving the death of the Eva they knew, even if she survives to adulthood, which I believe is pretty unlikely given the severity of her brain injury. The way he speaks about her is, quite frankly, pretty disgusting most of the time, and between that and this post indicating "sinful" coping mechanisms, I doubt he and his wife are addressing the impact of Eva's condition on their relationship. When each half of a couple begins dealing with tragedy like this alone, their relationship is at risk.
Also, it's fucking disgusting that he says he didn't think that "[he] would ever have to go through" a situation like this. First of all, tragedy can happen to anyone, and it's ridiculously self-centered and entitled to think that just because you pray a lot to your god and bother other people to do the same, you're impervious to tragedy. What a fucking twat he sounds like. It also rubs me the wrong way that he behaves as though no one is suffering through this more than he is, when his fucking child is apparently in so much discomfort that she basically screams non-stop and nobody can figure out why or how to help her.
I really don't like this smug asshole.