It wouldn't be possible. There's also the matter of sound checks, rehearsal, and the like. Even if it would, do you think she'd want to perform a matinee, drive an hour to the airport, fly in, perform a concert, fly back, then perform another matinee the next day?
If this extension happens and Bernadette stays but keeps her dates, she'd probably have to miss 1-3 days for each concert. Especially when the concert dates are close together.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body