She keeps a secret for a number of reason. (Caution Spoiler Alert) 1st reason: In Harry Potter and the Deathly Hallows Its shown that when Lily got her letter that Petunia wanted to go with her so she sent a letter to Dumbledore asking if she could go but unfortunately she was denied because she didn't have any magical powers. 2nd reason: She was secretly jealous of her sister after that. 3rd reason : She thought that Uncle Vernon would think she's a loon so she kept her mouth shut.
His Aunt Petunia and Uncle Vernon.
Harry Potter's biological parents were: James Potter and Lily Potter (née Evans). Harry Potter's guardians were: Vernon Dursley (Harry's uncle) and Petunia Dursley (née Evans) (Harry's aunt). Vernon is a muggle and detests anything to do with magic. Petunia is the sister of Lily Potter (née Evans). They have a son named Dudley, who they treat well compared to how they treat Harry. Harry Potter's godfather was Sirius Black.
Dudley Dursley, Vernon Dursley and Petunia Dursley (Petunia Evans).
Vernon, Petunia and Dudley
Vernon Dursley, Petunia Dursley (Lily Potter's sister), and Dudley Dursley.
Lily Potter's sister is called Petunia Dursley. Petunia and her husband, Vernon Dursley, raised Lily's son Harry.
His mother's sister, Petunia, and her husband, Wernon Dursley.
Harry Potter's father is James Potter and Arthur Weasley is his father-in-law. He was raised by his mothers sister and her husband, Petunia and Vernon and Aunt Petunia Dursley His godfather was Sirius Black.
Harry Potter's father is James Potter and Arthur Weasley is his father-in-law. He was raised by his mothers sister and her husband, Petunia and Vernon and Aunt Petunia Dursley His godfather was Sirius Black.
Harry Potter's father is James Potter and Arthur Weasley is his father-in-law. He was raised by his mothers sister and her husband, Petunia and Vernon and Aunt Petunia Dursley His godfather was Sirius Black.
Petunia Dursley is the sister of Lily Potter, Harry's mother. This makes her Harry's aunt. Vernon is her husband Harry's uncle, and Dudley is their son, his first cousin.
Harry only also one aunt; Petunia (Evans) Dursley his mothers sister. Petunia's husband has a sister called Marjorie 'Marge'. Although not related to Harry he is forced to call her Aunt Marge.
Harry Potter's aunt is Petunia Dursley, née Evans. Petunia is Harry's mother, Lily's, sister. Petunia and her husband Vernon raised Harry after the death of his parents.Vernon Dursley also has a sister, Marge, whom Harry is forced to call Aunt Marge.
The name of Harry Potter's aunt who married Vernon Dursley is Petunia (Evans) Dursley. Petunia is the sister of Harry Potter's late mother, Lily.
Harry Potter's aunt and uncle are Petunia and Vernon Dursley. Petunia is the sister of Lily, Harry's mother. The Dursley's raised Harry after the death of his parents. They also have a son called Dudley Weasley who is a month older than Harry.
Harry Potter is not related to the Malfoy's to the best of my knowledge. I suppose Harry's godfather is related to the Malfoy's but since his godfather isn't his flesh and blood that doesn't technically count.
Petunia Dursley, Harry's Aunt