Hhhhmmmm. In Victorian times, in order to even get inside a proper lady's corset, you'd have to unhook front, back, and unbutton outer clothes - then the lacing - these "proper" ladies had to have another person lace their corsets up the back - there wasn't an inch to spare - - if trying to insert an object inside the corset - by this time she might be "passed on". I think your egg might have had a stopper? And maybe even a loop to hang it on? Then the lady herself or a very proper lady friend could unstopper it and wave it gently under the nose of the "indisposed".
With all due regards to Victorian propriety, best wishes, KB
ps: I worked as a docent at a Victorian mansion - some of the upper classes put little girls into tightly laced corsets - I also wore my great grandmother's wedding suit jacket - in neighborhood "plays" - until I was about 10 yrs old - my great gran married in about 1890 - and I am a size 10 person - LOL
