The amount of provision she gets should be proportional of how good she is doing in the relationship. Are you well satisfied? Does she cook, clean and take care of you?

If not, just provide the bare minimum.

(This post is an answer to another that said that sex is or should be a reward, I don't hold this worldview and you are not getting any good place with that mentality)

I feel like a lot of modern women on the internet are really narcissist, they only care about the man to the degree he satisfies her needs. The same logic can be applied to her.