Boy does your little one have you trained! lol We did the expen thing and it was the greatest thing ever. This way he could come and go as he pleased and needed.
I kept his crate, water and pee pad in there. (Still do-minus water)
If you are wanting her train her, you need to ignore her when she whines and cries other than pottying. she knows that you will wake up and pick her up so she continues to do so. Every once in a while Hot Rod and Maggie will have barking fits in the middle of the night and I get up with them and then it lasts for a couple of days because they know I'll come down. After about the 3rd night they get the message that I am not so they give up. It's amazing how smart these little boogers are. Good luck.