Adjustment of Status - I-485

Hello, I need some insight on my upcoming interview.

I traveled with an Advanced Parole on April 2017 with DACA and thankfully came back in thru immigration, thru Orlando airport, and then started my AOS. I have been married since March 2009, we dated since 2007.
I do have an arrest record for domestic violence that happened back on 12/2010 towards my wife, there wasnt a conviction but there are pics and a police report. Since then we obviously worked thru it and was able to get my work permit with DACA and let back into the country with AP.

My PD for i485 AOS is 9/11/2017 Marriage based
and I received my letter for interview for January 10, 2019.
This is the Ft Myers, FL location. The wait was about 15 mos, for the ones who are in the same boat.

Oh, and my work permit expired last month and i submitted the renewal back in Sep 2018, but USCIS sent a letter authorizing a 6 mos extension if the renewal permit didnt come in on time.
Our lawyer is coming with us, because even though we have two kids in common since 2011, bank accts together, pics, health ins, im the beneficiary on her retirement accts, just bought a house, and the deed is on our names, but the loan under my name because of her bad credit. (we had no wedding we went thru the court)
I am terrified of my arrest record. I need to know if any of you guys have gone to the interview with an arrest record or know anyone whos done it, especially domestic violence
I want to know how should i answer if the IO asks me in detail "what happened"
Also i went ahead and redid my immigration physical because even though USCIS, states that the first physical is good for two years , it also states it is at the discretion of the IO if they request an updated one. So just to cover all my bases, i redid another one.