for me, the "sharing" path, is not about D but about F.
it is F that push D into it, and allow those thoughts to bloom inside D.
right now F is still orchestrating her choices. he could stop it any time and D would be ok with it.
for me its very strange that D would take charge.
sure, the last update we can see that D is starting to act herself, but its not too late for F to close all doors for any possible sharing, and that would not make D feel unsatisfied.
I can not control the story, but for me, to make the sharing exciting, F+D need to be close, and even closer when the sharing is starting, if not, the sharing is a failure and could rip the relationship.