The lady's wrist is slightly broken compared to the man's, but it is not all that broken unless the man mispositions his hand. If he keeps his hand high and back where it belongs (put your thumb in your ear is the old joke) then his forearm is fairly vertical. Her shape causes her elbow to hang slightly inward, so her forearm is not at all that different an angle from his in that plane. The palm to palm connection actually helps connect her upper back shape to the man's hand. If his hand is in the right place the effect of unified bodies is wonderful, on the other hand if his hand drops too far forward and down, the can really bend her backwards.
Also, with proper offset the hands will meet at an angle - his hand is closer to his elbow, perhaps even a little bit inside, while hers is somewhat outside her elbow. However her elbow should never actually be straight - while this would extend the lever arm of the connecting point in a direction in which it is already long, it drastically reduces the already small lever arm of the difference in relative heights of her two hands, decreasing the information that can be communicated.