genuinely after opinions here - honestly don;t know if this would be a reasonable thing. DP and I are thinking about wills and guardianship of our DC if something happened to us. we each have a sibling with a partner. My sibling is not very maternal I think and we would prefer his sibling to have DC but her partner is Australian and I would want to know that they wouldn't take DC there to live until at least after my parents are gone (morbid, sorry). Is it unreasonable to make this a condition as it would bind them here for 20 years. They have mooted the idea of emigrating but its very up in the air. My parents could not travel that distance for various reasons and could not afford air fare for DC to visit them regularly either. opinions please..