Losing a parent is really tough, that's all I can say.

My sister's a therapist, and when our dad died, she rearranged her therapy schedule for at least 2 months (between being with Dad while he was sick, and then dealing with the funeral and so on, and dealing with other family disruptions.)

The stress, the feeling of being suddenly unanchored -- for us, that lasted a while.

I agree that you should talk to her about it some more. (But maybe she is just having a hard time adjusting to her mom's death.)

-Far