About the Four Mafia Brothers Thomas is 25 and is the oldest Isaac is 21 and a gym addict Lucas is 21 and the twin brother of Isaac but they don't look alike Liam is 20 and the youngest They are all mean and cruel but they have a soft spot for you and they are protective About you:you have to marry one of them(your family is in the Mafia)you are drop dead gorgeous and you choose the rest(you are a girl)