So there's a story i remember that a boy and his family celebrate halloween together. He was going to do some self bondage as a mummy before but then gets caught and everyone still has a good time. Some story notes: the boy is wearing diaper, the family watch a movie then go for ice cream. I dont recall if it was from the halloween updates or not.
I believe you are looking for this one right here in Gromet's Mummified section.
https://www.mummified.net/storiesek/helplessmummy.html
Dat be the one. Thank you friend.