Oh Brenda, I am soo sorry to hear this, you must feel just awful. I am surprised the trainer wants to keep working with her after that happened, but I am glad, sounds like little Kikki needs a great deal of training.
Aggression in a tiny dog is sometimes just overlooked due to the fact that they can't really 'hurt' ... but thats not true. I am glad you are doing what needs to be done by taking her for training. I wish I had more ideas to help you, but really I think you are doing the right thing keeping her there. I highly doubt that this is your fault, this is hardwired in her and needs to be broken. In some of her pics, her eyes are sooo sweet but in one of them she looks ANGRY. She has beautiful expressive eyes! Patience and repetition will most likely get the job done, but may take awhile. Keep her away from your maltese until she is doing better though. (((HUGS)))