Can a federal court recommend visa or reinstate a visa in a lawsuit?

No.

Can my mother sponsor my husband (her son-in-law) for his green card?

No, she cannot file the visa petition, but she can sign a joint affidavit of support.

I'm a Permanent Resident here, my son is 4 years old born here in AZ, is it possible to get my citizenship based on this?

No, you cannot file for citizenship based on having a child born here. Instead you need 5 years permanent resident status.

If you can show that you intend to return to your country, you can be admitted as a visitor to the U.S.

Since you have no immigration status. The requirements for DMV are not the same as the requirements to get public assistance.

It should have no affect on your immigration.

I am looking for a lawyer

You could refile for adjustment of status with a new visa petition.

Primary in Acceptance and Dependent in RFE

Anything is normal.

Dependent L2 Green card processing who is working on L2 EAD. Both spouses work for the same company.

Your new EAD will not invalidate the old one.

Selected as the best answer

You should tell your employer. You do not need to do anything with your I-94. You should discuss taxes with an accountant.