"Charlene Von Doofenshmirtz" is the counterpart of Charlene Doofenshmirtz in "Steampunx". She's seen having picnic with another man during Professor Elemental Future Past.
Much is not known about her, though it might be true that she is Professor Von Doofenshmirtz's ex-wife, given that she is Charlene's counterpart and Vanessa Von Doofenshmirtz exists.