You and Isabella's brother dp Emma next

After a short break, you and Isabella's brother give your girlfriend the same treatment you gave his sister. You double-penetrate your slut.

You figure, sharing his **** with you deserves you giving something back - so you let Isabella's brother fuck Emma's pussy. You keep her asshole off limits from the guy though - not that he doesn't ask (repeatedly). Also she pulls off of him before he cums (this is right after you shoot your thick load deep into her bowels) - and instead his sister kneels down in front of him and accepts his seed right into her mouth.

After everyone has cum a couple times you are all exhausted and the four of you sleep naked in Isabella and Jacob's king sized bed.

In the morning you all wake up horny and there's a whole other round of fucking.

Jacob is still going to be away for a couple more days, so Isabella (easily) convinces her brother to extend his stay. He's not ready to leave - too afraid it will be years before he experiences his sister again.