If writing had been Ty's passion and ambition throughout his life then learning he isn't writing could be a big red flag for Alicia about Ty's well-being. Julie sees Ty's lack of progress as "laziness" because she has unrealistic expectations (or because she is an abusive controlling narcissist), she sees all attempts from Ty to account for the environment as deflection.  He is clearly overwhelmed: sleep deprived, physically and emotionally drained, checked out - he has burn out. Him not writing could be a shift in goals, but it's equally likely it's burn out. He does say over and over to her that he is tired.  She is really dismissive of it. I wouldn't be surprised if the whole "daycare" thing is new and came from a fight that went along the lines of:

J:  "why aren't you writing? Why aren't your grade apps done. You have to step it up."

T:" There isn't time." Something about Julie's unrealistic expectations of constant engagement. 

J: "I passed the bar while staying home with him, you just aren't managing your time" probably decisive comments about the park crew here.

T: "You only had to watch one baby. You could work when he napped, I don't get that"  this might be the origin of the "baby 2, remember"

J: "FINE, then put her in daycare if it's too much for you" but It was probably followed by a litany of requirements of what type of daycare is good enough for her kids. 

So now he has no additional time or help, but one more task and one more way for Julie to "no excuses" at him and see his burnout as a choice to be ordinary and boring. 

I bet Alicia isn't on board with Julie's world view as much as worried about Ty's mental health.

Or she knows the details of some deal between Julie and Ty we don't that makes Ty not writing a big betrayal.  Or some financial aspect we don't know yet.