Sometimes if a person experiences a terrible trauma and doesn't actively work through it w a therapist then they are stuck in that time period, emotionally and maturity-wise.
John is all devastation on the screen.
Kaci says she'd be willing to forgive Evan almost no matter what, but once she learns about what's happened with Morgan, will that still be the case? He acts entitled to fulfill his every whim.
Out of that situation, Morgan and Kaci started exchanging messages and actually bonded over Evan's behavior.