Continuity mistake: In the scene where Mike picks up Deborah, we see a shot of his Audi and there is no licence plate on the front of his car. In the shot we see him driving, it has one.
Continuity mistake: When Flor and Bernice hug at the end of the movie, Bernice is wet from swimming in the pool, getting Flor's shirt very wet. In the next shot when Flor is waiting for Christina by the car in the driveway, her shirt is completely dry. And finally, when she then goes to hug and say good-bye to John, it is wet again.
Answer: There were no explanations offered. I think the movie was far better in leaving that question, and whether or not he married Flor, unanswered. The focus was on the child and her respect for her mother - not the other relationship.