Spoiler: Alison's Mom Has a Huge Secret on Pretty Little Liars

Considering that Alison (Sasha Pieterse) had several big secrets, we’re not surprised that her mom (Andrea Parker) has one too. You know what they say — like mother, like daughter.

However, secrets don't stay buried in Rosewood. When Alison’s mom returns to town in Season 2, Episode 6, “Never Letting Go,” for a charity fashion show honoring her daughter, her secret will be revealed. And according to Pretty Little Liars showrunner Marlene King, it’s a juicy one.

Marlene told E! Online, “Alison's mother and one of the Pretty Little Liars' parents have a secret too they've been hiding.” We’re guessing she had an affair with someone's father. Our money is on either Mr. Hastings (spoiler alert — they have an affair in the books), or Byron Montgomery (Chad Lowe), since he doesn’t have a good track record.

Maybe Ali’s mom had a child with another PLL parent and they’ve been hiding it all these years. OMG, two of the little liars could be stepsisters! What? It could happen.

Source: E! Online