At least she found the kid

My friend has four year old twin boys. Most of the time her children multiply themselves and add more until she ends up with 7 kids.
The game of choice is dress up. Clothes are scattered all over the play room while they dress up and play. Once when I came over I found one of the twins in a rainbow sparkle skirt borrowed from his older sister. He told me he was a "Dragon Slayer."
The main problem my friend runs into is when it is time for the boys' friends to leave.
"um... where is Ethan's ____(enter article of clothing)___?"
The worst my friend told me when one of the kids was picked up and they couldn't find his underwear.