Answer:
At the sound of me, one may dream or stamp their feet, At the sound of me, one may laugh or sometimes weep.
Pregnant every time you see her, yet she never will give birth.
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
What flares up and does a lot of good, and when it dies is just a piece of wood?
Golden treasure I contain, Guarded by hundreds and thousands. Stored in a labyrinth where no man walks, Yet men come often to seize my gold. By smoke I am overcome and robbed, then left to build my treasure anew
I am your mother's brother's only brother in law. Who am I?