After she is served the complaint, she has 30 days to contest in writing to you or your attorney, if you have one. After the 30 days are up, you go to the clerk of court and ask for a calendar date and you will send her notification of hearing, which has the date and time for the hearing. She does not have to sign anything. She does not even have to show up to the hearing. The judge will sign the judgment for absolute divorce at the hearing.
Word of advice, make sure it says absolute divorce and not divorce from bed & board(we learned this the hard way). We paid an attorney, he filed for divorce from B&B and was disbarred before we realized the mistake. We were out all the money we paid him and got nothing but a mess.