My wife and I agreed childcare arrangements and I drew it up into a draft separation agreement. Basically its the divorce settlement.
She has had the draft a while but I've not had any comments - in fact at the moment it only gets mentioned as part of any spew.
It works well because it manages expectations. Yes it freed W up for time with OM but at the same time I've been able to plan my life. No its not what I want but its only not needed if my wife suddenly changes her mind
Both mid 30s, 2 young kids BD 7sep14 XW moved on long ago, now living with OM1 D paperwork in progress