I think this is a really tough spot. On the one hand, you're getting 2:1 with quads and lose only to two specific straight flush combos. On the other hand, there is little or no value hands she beats. TT isn't going to shove that deep, and AA is possibly just calling the river 4-bet also.
Her opponent's actions are also very consistent with KdJd. He would raise pre and then might check it to the river with some showdown value, then of course continue betting and raising when he hits the nuts.
Jon makes a good point in the article that Villain is supposed to be bluffing occasionally, and if so her hand quickly becomes a call. But if she's very confident in her read that this guy would never 5-bet shove the river with super-deep stacks, and loses to his super-small value range -- then while folds like this can never be easy, it would be the right play.
A few other thoughts:
- What a boss grinding 20/40/80 unbacked with $60k+ sitting in front of her.
- I think we usually have to bet the turn to start getting value on a coordinated board.
- I would call river, probably get shown KdJd every time, and then feel stupid