"Consider that many young couples could not even get along with their own parents and inlaws, me getting along with both nannies are really miracles"

这话好像不太对。nanny 是你花钱雇的，你的主人地位不言而喻；那些不明白道理的nanny你也不会雇她。own parents and inlaws 常常会反客为主，所以很多不好相处。