Granddad Freeman is the man who took the flask.
Granddad took the flask and decided to keep it for himself. After Nicky took it back, Granddad went to his grandsons, Huey and Riley in response. Holly the Angel is the ancestor of Elle Woods.
Holly the Angel are actually quite alike. They are very kind women who want to be independent and have the same hair. The hot mom and her son will go to Hell for killing the Peeper.
A deleted scene shows they drop a TV on his head after he fell off the tree, which is murder (if they intended to kill him). They have no regrets over it under the idea he brought it upon himself, and in this universe you Can't Get Away with Nuthin'. Satan's child from either Cher or the Blair Witch will become the next ruler of Hell.
