Abram twice to Pharaoh of Egypt & Abimelech of Philistine lied and sent his wife, Isaac the same to Abimelech?

and in both cases GOD (?) has threatened i.e. diseases to Pharaoh and Infertility to Abimelech ladies, both the kings and in both the cases the culprits are gained with gifts, gold and money. Both are counted as Prophets and fathers of Kings. So adultery is encouraged and culprits are rewarded with prosperity and great place in the Bible. How it is possible? How to give respect to these great Prophets and their godfather?