Ajay. You are right and she could do all of that so long as the principle F-1 still in status. Good luck

Greencard Holder Reentry Permit

You need to do the same thing you did before. However, you understand that you will not be eligible for us citizenship if you stay out for over 6...

Will U.S. consulate issue an immigrant visa to me without passport?

You must have a valid passport with 6 months validity.

Adjustment of status

You really should consult with an immigration lawyer. If you are not subject to the two year home residency, then you may be qualified to adjust...

My I-94 expires in exactly 30 days. Can I still file for an extension?

Consult with an immigration lawyer. Yes you may still be eligible for extension for the right reasons.

2nd interview after recommended approval?

Not being familiar with your case I suggest you take a lawyer with you for interview.

B2 visa holder. What is my chances to come back to the USA after using my SSN and working here ?

If you worked as a B-3 you are in violation of your visa and not eligible for another one

It is possible to get a legal status and claim for the mental abuse if I'm married for 1,9 years to a green card holder?

You need to consult with an experienced immigration lawyer now. How long you have been divorced? Yes you can file for green card based on Vawa (...

Will that arrest and charge make me not eligible for the I-601A??

You need to consult with immigration lawyer asap. We all do phone and skype consultation. You don't need to do I-601A and we need more information.

Can I also petition his wife as derivative who is my stepmother and were married since I was 20 y.o.?

You are petitioning for your dad is fine but not step mom. Your dad however, once he get his green car may apply for his wife.