How Does 'Summer Sisters' Explore Friendship?

From Best Friends To Secret Lovers!! Rory and Todd have been best friends for thirteen years. They thought they knew every secret between them but a playful dare unlocked a lifetime of hidden feelings. It strips away the pretense and leaves only a burning, undeniable truth: They’re in love. But now they have to battle the outside world that is desperate to keep them as ‘best friends’

Olivia had never thought she'd see Aiden other than her sister's best friend who is constantly a thorn in her shoes, but after they accidentally made out, things changed between them. Aiden is that one man she should not want. He's forbidden. Off Limits. A certified man whore who doesn't do relationship. And what's worse? Her sister's best friend.

For ten years, my twin sister Ayra was the perfect fiancée to Julian Vance, the untouchable, merciless king of the city. She got the diamond, the penthouse, and the envy of the world, while I got the crumbs. Until the night Ayra vanished right before the wedding of the century. With a multi-billion-dollar merger, corporate empires and my little brother's life hanging in the balance, my toxic mother corners me with a chilling ultimatum: Step into your sister’s shoes. Wear her ring. Walk down the aisle. Pretend to be her until the Vance family finds her. I should have said no. But to protect my fragile little brother, I put on her veil, took her vows, and became his wife. I thought I was just a temporary placeholder. I thought Julian hated me. Until our wedding night, when he pinned me to the bed, trapped my wrists, and his lips brushed my ear, sending a shiver through my soul. "Did you really think I wouldn't recognize my own wife, Maya?" he whispered, his eyes dark with a terrifying, possessive satisfaction. "Did you really think I didn't know it was you I spent the night with three months ago in the dark?" He knew. He always knew. Julian didn't just find out about the swap—he engineered it. He has been watching me for ten years, waiting to claim the girl who once saved his life. Now, I am trapped in a luxurious cage with a billionaire who orchestrates everything, carrying a secret pregnancy he deliberately planned, and realizing a chilling truth too late... My sister didn't run away. ​She was replaced.

“We shouldn’t be doing this, Andrew. I’m over a decade older than you.” “If not right, then why does it feel so good? I want you Ada, I desire you!” There is nothing more intoxicating than the alluring scent of a woman you love, not even the pleasure at the bottom of a bottle can compare. 21 years old Andrew is faced with criticism when he falls in love with his sister’s best friend, an older lady and a divorcee. But Andrew is willing to go against the world for her. His obsession soon grows into addiction, but for how long can this forbidden affair continue? Is he really willing to face the challenges that come with loving an older woman? And is she ready to do the same for him? What happens when her ex-husband returns to win her back? Now she must chose between the one who returned her smile and the one who always held it.

When a sister is depressed and angry, it affects the other. Lily has been in Lucinda's shadow all her life. Their relationship is one of love and hate. When Lucinda falls to alcohol, Lily bears the hurt the most. And when Lucinda dies, Lily is heartbroken. Lucinda was hiding a great secret from Lily before her death and now, Lily is harbouring a terrible secret about Lucinda's death from everyone. As the story unfolds, the truth about Lucinda's alcoholism and death comes to light.

When fiercely independent Aiden Matthews makes a spontaneous decision to visit home after a long absence, what she intended to be a day-long trip turns into an entire summer filled with old friends, new acquaintances... and a rekindled old flame. But after stumbling upon a seventy year old secret and the ghosts it stirs up, Aiden must navigate the sudden challenges to everything she thought she knew about her family history while confronting her deepest fears in order to chase her most fervently held dreams.