A: "Uncontested" is not a type of divorce in PA. There are fault and no-fault divorces. One can become uncontested if the other person doesn't object after having been served the appropriate paperwork. I wonder if you're using online forms provided by an online company for a fee? Often forms obtained from these online companies do not meet the criteria of the county in which the divorce is filed. You might save yourself a lot of trouble by contacting an experienced family law attorney in your area for guidance. Also, remember that you must serve paperwork on your wife in accordance with state service rules. That means you'll need to know her current address. There are alternative means of service but, again, I'd refer you to an attorney to discuss what options are available to you.
A: You can file a child support complaint against both parents. It might be helpful to you to first discuss the matter with an experienced family law attorney in your county, who can explain the process to you but, in the end, this is a case you can pursue on your own if need be.
A: You can file for a stepparent adoption. You should consult with a local attorney familiar with adoption procedure in your county as, while the state rules are consistent, each county has it's own ways of doing things.