How could I get mad?

Ashlyn likes to disappear sometimes while I am working in my office in the morning.  She will sneak out and try to be really quiet...mostly because she is doing something she shouldn't be.

We have been trying to keep the bathroom doors closed because she likes to go in and play in the toliet.  But today, this is what I caught her doing. 

And I tried not to let her see me laugh but it was just so darn funny.