Is 'I Will Remove Your Heart Of Stone' A Metaphor?

(This story is book one of heart of stone series or can be read as a standalone)Eighteen years ago, a mother sacrificed her baby to Lucifer in return of the baby safety.The mother died during the birth, Lucifer accepted the sacrifice, and he’ll be back to claim what he owns. Nova, a depressed half-wolf, half-human girl. On one lonely night she decides to end things, she'd end up in hell, but even real hell can't be as bad as her life. That until the king of hell scolds her, and tan her bum claiming her as his. This is a ddlg/cgl/SFW story, be warned! Apologies for any misspelling or grammar mistakes.

Two hearts which have always been filled with warmth and joy for so many years of their lives. Suddenly one heart becomes cold because of the other heart. The other heart becomes cold because of some other reasons. Now these both have one thing in common that is coldness surrounding their hearts. Did they really became ice cold? (or) Is it just a façade to show everyone? (or) Is it directed in high demands only towards each other? Could they melt each other coldness easily or would they need the help of a little angel. Sometimes melting ice can be more difficult than we actually think…

When the nurse pulled the IV needle out of the back of my hand, her gaze was filled with pity. “Mr. Young, the heart meant for your transplant was transferred at the last minute. It was sent to the VIP ward on the seventh floor. It’s a shame, but all your pre-operation prep has gone to waste.” Marcus Stewart was warded on the seventh floor. He was the frail young man my sister brought home. Ten minutes ago, Marcus suddenly had terrible chest pain. My usually strong mother burst into tears. My stoic father slammed the table in front of every expert in the hospital, then decided to give Marcus the heart I had been waiting three years for. It was supposed to save my life. I hurried to the end of the corridor, but the green operating light had already come on. Clutching the twisting pain in my chest, I leaned against the ice-cold wall and slid to the floor. There was no need to wait anymore. My heart failure was terminal. The doctor said I would not last the next few days. The mechanical voice sounded in my head. [Master, your vital signs are rapidly deteriorating. If you terminate this body and leave this world now, you still have a chance at a new life. Would you like to proceed?] I looked at the faint grey hue of death tinging my fingertips. “...Yes.”

A heart, as soft as cloud, goes through so much pain and agony. Any smile that lits up his face, later turns to sorrow. But that life got changed by an angel who took his breath away, who sealed the hole in his heart and gave him the happiness he could ever wish for.

Today is my wedding day. When we reach the ring-swapping ceremony, my wife, Ariana Holmes, suspends the ceremony for three minutes, simply because a man has barged into the venue. He glares at Ariana darkly. "Ariana Holmes, you've tattooed my heart on your chest, yet now you're marrying another man? Are you forcing me to carve my heart out of your body?" As soon as his words fall, he lifted the blade in his hand. Realization dawns on me. It turns out that the heart tattooed on Ariana's chest isn't mine, but rather, her first love's. At that moment, Ariana, who was all docile and quiet earlier, shudders violently. She slides the ring onto my finger haphazardly before rushing toward Ivan Hatfield. "What the hell do you want from me, Ivan?"

She is one who loves fiercely, but it always ends bad for her lovers. One boy upsets her pattern of love crisis, and she would rather leave him, than destroy him. However, there's more to this than she realizes