I'm sorry but you probably need to consult local attorneys.
For example, within my STATE it varies greatly between counties what will happen.
For example, in one county, a second offense DUI the prosecution never plea bargains, and many are alooking at 90 days in jail and oppressive probation for 2 years.
Then, in another county a 3rd offense DUI always gets pleaded down, and they undergo very minimal probation. . .
I know absolutely nothing about houston, so it's important to consult with a Houston based defense attorney. I don't even know if your Husband is charged with a felony or not. Laws on DUI are all over the place in this county except for the past few years on the BAC level (.08).