S.R.
While I have no PERSONAL experience, there was a family that I went to elementary school with who had this happen. Mom and dad got married, had all their kids, then got divorced because dad had a drinking problem. X number of years down the road (don't remember how long), he had gotten help for his drinking problem so that it was not longer an "active" problem, mom and dad started dating again, and eventually got married again. He's kept his promises and stayed clean, too. My mom is still in contact with them. :) They are really good people.