Hello! This sounds like a great extension of some existing tools (from various smartphone-based apps, to things like Pavlok) but with contemporary AI to enable a much wider range of applicable scenarios. As someone who has genuinely considered hiring someone to look over my shoulder all day, I wish you & your product success!
One thing I notice, however, is that the use-case appears to be limited to scenarios in which there is a determined target behavior to do or to not-do. My main struggle, in terms of literal ‘control of my self & actions’, is determining where to apply my time & energy. This would be true even if I were a single person renting an apartment, as I have numerous “projects” competing for time, but is considerably more difficult because I have a family and a house and debts, which (seemingly) add up to more demands than can be met simultaneously. Though here I may be conflating broader “executive functioning” with the more narrow “self-control”.
Not addressing this is not a defect of your product, in any way. I make this comment only to suggest a more tempered language about the product, in part to ensure that your users come in with a similarly-tempered expectation.
These reasons seem drawn from a very individualistic, modern perspective. From a historical, more community-driven perspective, it seems that two other major reasons would be:
You do not wish to “dilute” your value to your partner in some way. (Whether that be in terms of affection, economic impact, social status impact, parentage of a proportion of their children vs all of them, etc)
You believe a monogamous couple generally provides the best context for successfully raising your own children. (Whether that success be defined more in terms of the children’s life-outcomes, or more in terms of them being willing & able to care for you in old age, etc)