Leaving kids with inlaws

My husband and I came to an understanding very early in our relationship that our children will not be allowed to be left alone with his parents. They do not have the same values as us and quite frankly we don't trust their judgement or feel they would respect how we want to raise our children. We don't have any yet but now that it is coming into the near future, I'm wondering how we will be able to implement this. We are not close with his parents as it is and don't see them very much because his mom is a narcissist and his dad was an absentee father (still is). I'm wondering if anyone has advice or had the same situation?