Well first off the Dark Lord is dead so she most likely would attempt of possibly kill Potter for killing her beloved master. If she did suceed in killing him then she'd end up in Azkaban for the murder of an Auor and if she doesn't get caught well then hope and pray she doesn't end up comminting suicide to be with the Dark Lord.

Well, since she died before Voldy, I think she would have killed Potter and eloped with him, since he would in debt to her. They would have gotten a holiday home in Hawaii and ruled the world.