Abraham's 2 'sins'

Abraham is often thought of as sinning with Pharaoh and Abimelech

I wonder if it's more of Abraham getting his bride that he sent to Egypt to be under slavery from Pharaoh - as Jesus did before coming back to Canaan

and then the triumphant bride causing the closing of the 'wombs of the world' - in Abimelech who is the Leader of the Philistines - i.e. a type of Goliath/Satan
so the church is separate from the enemies of God - yet living amongst them and they are not allowed to reap any of their benefits - the 'well incident' with Phicol
that's why sandwhiched in between the Abimelech incidents is the seperation of Isaac and Ishmael - cf. Gal 4

haven't quite thought about Isaac though...