Which would be very un-Star Wars. Maybe Anakin turns halfway in the movie and doesn't get donned in his Vader armour until the end. There may be two moments: the turn to the dark side and the injuries that make him need the armour. After the first the separation between him and Padme takes place. And then.... there's another moment before that, that they may be separated. Remember the line from ANH by OB1: Owen Lars "thought he (=Anakin) should have stayed here and not follow old OB1 in some damn fool idealistic crusade."
Maybe Anakin gets kicked out of the Jedi order and OB1 goes to get him for some clinching moment in the wars...
But still, SW movies only last a particular time, fairly short.... But then, even Empire may have had a time lapse of a few months as well.