Poop and pee

We have had a little backsliding on the potty "training".
And I am not sure if it is because the Booty is feeling insecure or because our housekeeper/nanny MB is not paying attention or being as diligent as me. This week each day she came home from the playground she didn't make it to the bathroom. One time she even pooped her pants, which she has never done before.
What was troubling was that when I surprised the two of them (Booty and MB) on the playground MB was busy texting and Booty was soaked. When we arrived home she had two more accidents before we made it to the bathroom. It seemed as tho' she was holding it in. But I don't know. She can get distracted and forget to go. This is why I always make it a habit to have her go periodically.
Also, she is only 2 and a half. What should I expect?

Finally, (wagging fingers) bought a baby monitor and used it last night. The girl's bed returns to its room.