Thanks for sharing this. It's not a frequent topic here. As others have noted, before you do anything else, you need to decide if you will be happy with monogamy. Not "OK." Not "accepting." Not "willing so you don't lose her."
Happy.
Now, this is at its core, a renegotiation of your arrangement. Not a bad thing, but still a significant thing.
Knowing more about her ultimate goals and motivations would help. Without understanding what her version of "success" looks like here, it will be difficult to craft a (new) offer that you believe will be a win-win scenario. So maybe rethink her primary reasons for sugar dating. Then rethink her primary reasons for sugar dating YOU.
It seems that more allowance is not her primary objective - for now.
- Although she says she is really looking for more dates without more allowance with the objective of an effective monogamy, is that what she is really trying to accomplish? Note that she adds an unasked-for requirement on HER that allows you to stray when she fails to meet the new schedule. Why?
- Presumably this puts more pressure on her to meet the requirements. Does she believe that she will never miss a date? Will she really be OK if you do bang someone else because of her missed date? Or will she think (hope!) that the offer itself will suffice?
- And what about her? Will she still have the option to take on a "rando" or a new SB outside of the new schedule? Do you care if she does?
- In other words, will the new "monogamous" arrangement really be monogamous? Or is it just monogamous with an occasional Hall Pass?
- Finally, will the new deal now include some other benefit that is not included now? Like always BB, perhaps more extreme acts, or she will bring the occasional girlfriend (if these are not already offered)?
Remember that in new or renewed negotiations the power dynamic is unchanged: She has the power to say YES. You have the power to say NO.
Perhaps you can test this with a middle-ground change "to start"? Offer her a trial run of maybe 1 more time a week and you will "target" one less time a week with other SB's.
She may ask why? Use the nice guy approach: "Well, I don't like breaking my commitments and promises, and this change will impact other people. Don't you think I need to be fair to her/them as well?"
- She's not likely to argue with you for being a "considerate, good guy." And if she does, that is an important data point to note when determining her true objectives.
Call for action: Phrasing is important here, so put the burden to evaluate the test on her:
"Let's do this for the next 2-3 months, and then you can tell me if it feels good and you want to step up to the next level." Again, this gives the appearance that SHE is in control of her decisions. Of course, you can (and always could) bail at any time.
Looking forward to seeing how to more forward...
Life is good
The Cat