Finding my way into the light

[Holding]

I could use some advice in dealing with XW and childcare expenses.

Per decree, there are no shared expenses between me and XW, and no child support payments either way, as we have 50/50 custody. XW actually makes more than me and could have paid me child support, but that was a concession I made during mediation. XW is responsible for all health, dental, and vision costs.

Up to this point we've handled all expenses individually. XW has tried to get me to pay some expenses, and I countered saying I'm not required to do so. However, I clarified that I'll consider splitting an expense if she discusses it with me beforehand. She replied that she does not need my permission to make purchases for the kids. I agreed, but reiterated that if she wants me to split the cost, she should consult with me first.

(Keep in mind XW and I communicate via familywizard. She will happily take a mile when given an inch. She already signed my son up for football without consulting me, put dates on the calendar during weeks that I never agreed to, and when I pointed out that I never agreed, she tried to claim that I had.)

Anyway, XW continues to submit expenses without asking me, and it's devolved to things that cost $8 (a football team t-shirt for my son). It's not the cost I object to, but the principle. I suspect she thinks it makes me look bad on the familywizard when I reject expenses.

Let me point out, I have agreed to split necessary expenses for school, like PE uniforms, school supplies, and laptop fees. She never asked my permission on those, but I stated I would nevertheless pay them because they were non-optional expenses.

One of my goals when dealing with XW is that I ABSOLUTELY need to enforce my boundaries. She has continually ignored my request to be consulted on purchases and events on my time, and I think I need to stick to my guns.

Am I being unreasonable? Shooting myself in the foot? Is this an imaginary line in the sand?