"Mirror Image" by Peter M. Wood appeared in Daily Science Fiction on February 6, 2013. "An eccentric physicist who used his home laboratory to research travel to alternate dimensions dies, and his son and greedy daughter argue over how to split up the estate."
The author admits in his notes that the story is a device to tell a tale of a greedy heiress who gets her comeuppance. The speculative fiction is incidental to the story and not terribly original but helps accomplish the author's stated purpose. 4 out of 7 rocket-dragons.