For better or worse, a step-parent typically does not have any financial obligation to a former step-child. The legal relationship between the...

Does she have to have a physical address for me to serve her papers and start the custody case?

I you are unable to have the mother personally served, then you can seek permission from the court to serve by mail to her last known address.

I've been separated from my wife for over 1 1/2 years. She served me and I responded. Now she won't follow through

Talk to a local attorney about setting a trial date. Hopefully you can resolve the divorce without a trial, but in any event it gives you both a...