ring gag and cucumber? That is new one for me! LOL

SHE has to keep her mouth suitably open. SO .... Time? add 1/3 time she can do it comfortably then ADD to it progresively .. make it a game.... '5 more minutes and.... you get the REAL THING...."

Punishements are indivdual .. but sometimes symbolic one work miracles...
make her carry the cucumber (or dildo or ...) in her bag all day, and wear rubberband around the wrist and snap it on the hour.... or write an essay on Worship..

And practice a lot! I have a feeling YOU will not find it too hard...
*I'm thinking that the tongue exercise can't hurt,*

really? LOL

Wollfffffffie