Dogs need consistant training throughout their entire lives. You don't just take them to a class and think that's it. You need to continue reinforcing training and good habits throughout the dog's life. If she is peeing on the bed, watch her closesly, take her outside more frequently, monitor/limit her water intake. Dogs do not just do things to spite anyone. Dogs do things because they are either sick or need more training, or other territorial reasons. So don't think she is doing it JUST to "be bad", because they just.. don't.