IM pretty sure it isnt limited to people in the household, that would be stupid.
Anyways, another option is the NFL+ package through NFL.com. I paid 99 dollars for that, and it gives me access to a bunch of preseason games, I can stream some games on my phone during the season, but you can watch EVERY game each week as soon as the live game ends. So if you can wait for games to end, you can then watch them all, including the condensed game version that skips commercials and halftimes..... that is an awesome way to watch a game.