Sentence 1: Melanie was turning 16. 
 Sentence 3: They kept the entire party a surprise 
 Sentence 4:  They invited all of her friends and got her a bunch of gifts 
 Sentence 5:  Melanie was shocked and super happy when she found out 
 Option 1: Her family couldn't throw her a party because she was grounded. 
 Option 2: Her family decided to throw her a sweet sixteen party.