It's a difficult choice for them deciding which one should have gone to Jace's appointment. I'm not one for assuming it should always be the mum - for us it's usually my husband, I'm not the best with anything medical. And that's quite an understatement. My husband does mostly paediatrics and has noticed that now that only one adult can accompany a child, it's often the one who probably shouldn't be.
If I was married to lazy I wouldn't want her to go, she struggles to understand even the most basic things, struggles to put a sentence together, has Frank and co taking over her face and I'd be worried the doctor might be concerned if she has a big eye little eye episode.
However, if I was married to Creepy I wouldn't want him to go because he looks like he smells, has greasy hair, an odd accent, thinks he already knows more than the doctor, wears a stinking beanie to cover his bald patch and is a perv. He also might use this as an opportunity to try to get more pain meds.
Might have been best if they got someone else to take him to be honest.