Yup we too had the same problem, Lakeisha was completely toilet trained and Tahlia just wasnt ready, it took a few months for her to be ready, and then when she started Lakeisha, went back to peeing everywhere!@!!

The only advice is, distract her so its just you and DS going, and she doesnt know til you come back, just until she's ready. Good luck, yet another little frustration in your day!!!