Warmth may not come back. Reliability sometimes does. For co-parenting, reliability is the useful form of trust. You do not need brunch. You need plans that stick.
Start smaller than your pride wants. Pick one recurring friction, such as late pickups or unpaid shared costs, and agree on one clear rule. Follow it yourself first. Waiting for them to go first can freeze you for years.
Use channels that reduce "I never said that." Written confirmations for schedule changes. One calendar both of you can see. Receipts for shared expenses. Less memory, fewer Saturday morning explosions.
Repair can sound like one sentence. "I was late Tuesday. I will leave earlier next time." Then leave earlier. Speeches are optional. Follow-through is not.
Expect uneven weeks. A good stretch does not erase history. A bad stretch does not erase progress. Track months, not hours.
Kids should not mediate your repair. They should see calmer handoffs. If direct repair is not safe or realistic, get advice about safer contact arrangements. Parallel parenting may help some families reduce contact, but it is not a substitute for a safety plan or court protections.
When money planning sits next to the repair work, a planning estimate can help you talk numbers without inventing them. Estimates are for planning, not a determination, and not legal advice. Shared tools that make coordination boring also help, because boring is how trust reappears.
Workable is the goal. Perfect can stay on the shelf.