If your 5 year old and your 3 year old are racing to see who can get their PJ's on fastest, and the 5 year old wins and rubs it in your 3 year olds face AND the 3 year old is over tired from a very busy weekend, the result will be a FULL ON melt down.
Melt Down will include high pitched screaming which you and your husband will immediately think means someone is mortally injured and you will both jump and SPRINT to the stairs.
At that point your heart will be racing and you will be winded from the scare. You will want to grab your 3 year old and hug her to you - even though she is screaming - just because she didn't crash down the stairs.
But the screaming - the intense, unbelievable, wracking sobs, screaming - will be so involved that your child will loose her ability to hold in her urine. This will soak both you and the screaming child in said urine.
You will drop your child on the floor and walk away. Calmly walk away. Your husband can handle bedtime. You must cancel any plans you had, change your clothes, get into your own bed, knit and veg in front of the TV.
Please be sure to communicate this to all those that could be affected.
Good Luck and God Speed.