Easy solution to this I think. You have to explain to her part of the fun is complaining and asking to be let out, but her saying ‘no’. That you dont’ REALLY mean it when you do it.
And the way you can make her feel safe about this is setting up safewords, if you say YELLOW then you really are uncomfortable or struggling, if you say RED then it all stops and you get sorted out.
The point of this she needs to get is with denial and chastity, during playing, WHEN YOU DON’T USE A SAFEWORD YOU DON’T REALLY MEAN IT.
This may take a few times where she responds to a complaint and you say, ‘hold on, did I use a safeword? So do I really mean it?’ ‘No’ ‘Good girl…’
But she’ll get it pretty soon.
Alternatively get her to message me and I’ll help her enjoy treating you way worse than you ever imagined 😉 lol
Be careful what you wish for!