Who is going to be Potty Trained First?

We have been really trying to work with Ethan getting him Potty Trained. Little sister wants to potty train as well. She is actually more into it than Ethan is. The other day after Ethan had gone she went over to the toliet and she was pointing and babbling to me. So I decided to sit her on the toliet. She went!!!. We sang her the potty song, and even let her flush the toilet. Gosh, who will be potty trained first???