Savannah Chrisley lays bare struggles of having to act as a single 'bonus' parent to her brother and niece while Todd and Julie are in prison - calling it the 'hardest job I've ever had'

Savannah, 25, has been taking care of her younger siblings since Todd, 54, and Julie, 50, were found guilty of taking part in a $30 million tax fraud scheme and sent to prison in January.