C.Ann,
Here is the info from the Gov website:
Synopsis of Law
Covered employers must grant an eligible employee up to a total of 12 workweeks of unpaid leave during any 12-month period for one or more of the following reasons:
for the birth and care of the newborn child of the employee;
for placement with the employee of a son or daughter for adoption or foster care;
to care for an immediate family member (spouse, child, or parent) with a serious health condition; or
to take medical leave when the employee is unable to work because of a serious health condition.
I think with the Doc stating that she is not allowed to work she would be covered. Someone may correct me but I believe Depression is officially recognized as an "illness". Also, I believe that she gets the job she has now, it is hard to tell from the website tho, I will look some more.
Here is a

for you. My DMom's husband is bi-polar so I understand the difficulty of mental illness.
Edited to add more info:
"(11) SERIOUS HEALTH CONDITION. The term "serious health condition" means an illness, injury, impairment, or physical or mental condition that involves
(A) inpatient care in a hospital, hospice, or residential medical care facility; or
(B) continuing treatment by a health care provider. "
"(a) RESTORATION TO POSITION.--
(1) IN GENERAL.--Except as provided in subsection (b), any eligible employee who takes leave under section 102 for the intended purpose of the leave shall be entitled, on return from such leave--
(A) to be restored by the employer to the position of employment held by the employee when the leave commenced; or
(B) to be restored to an equivalent position with equivalent employment benefits, pay, and other terms and conditions of employment. "