In her defense we don't really know anything about him and he's not covering himself in glory by airing their dirty laundry in public like this. My father is cluster B of some description and his super power is knowing exactly what to do or say to make the other person have a shit fit while coming across as perfectly reasonable. He permanently fucked up my mother who was "a sweet young thing" when she met him and once they divorced he moved on to me. He'll zone in on an insecurity or sore spot and make tiny little targeted digs that nobody else will notice until the victim blows up apparently out of nowhere and he can parade this as proof of their unreasonableness. When I eventually cut him out and explained why to my mother she knew exactly what I was talking about because he did the exact same thing to her.
For all we know, feigning poor health is his way of gaining control of a situation and making it all about him. Easy enough to bribe a Mexican surgeon to say he's had heart surgery I'd imagine.