She may. You are going to have to watch her close to see what happens. Her and the keets are probably more vulnerable to ground dwelling predators at night.
Just because you don't see her leave the nest does not mean she is not leaving the nest. Do not provide food and water at the nest. It attracts undesirable guests.
It usually takes 26 to 28 days for keets to hatch.
In the meantime prepare a "brooding area" where you can provide safety, food...
My keets start flying when they are 2 weeks old. At 5 weeks old your keets are capable of flying or walking on their own.
Teach them to be herded or to come to a call and let them move themselves.