Martha Kent's Gonna Be A Super-MILF!

Diane Lane has been officially cast as Superman's human mother, Martha Kent. Now geeks will all see her as like the SUPER-MILF, which she is. And I see it too!
What I don't get is that Martha Kent in "Superman Returns" was really old and she was old in the original "Christopher Reeves Franchise" as well. So are they gonna age Lane or just leave her the way she is (face wise) and just give her a grey wig? They may just go with the way she looks in "Smallville", because she's younger in that, well younger-ish. Don't get me wrong, she is perfect though........