One word: love
Loss of attachment is really really really hard on children.
I don't, honestly, think that possible outcome is something worth dewelling on; once you start feeling like a parent, the whole 'apply love' thing is entirely unavoidable.
But please do remember that "I fully intend" may at some point make contact with a reality hostile to your intentions, and at least consider the possibility you may one day need a plan Z.
To be poetic, my love for her transcends that of anything I'be ever known or witnessed. It seems we are stronger than my parents and her parents and they have been together for around 20 - 25 years each. We are 100% dedicated to each other and the thought if not being with her makes me physically sick.
"Having an appropriate will" is another form of having a plan Z; reality is not fair, not kind, and not your friend.
(trying to steer clear of doomsaying but there's an underlying "no matter how reliable your RAID array is an offsite backup is still a good idea" point I'm trying to make here :)