Romance that focuses on rejecting fated mates, especially with twins in the mix, often hinges on showing the protagonist's inner conflict through their physical reactions and defiance of primal instincts. I've noticed authors will have the character's own body betray them—racing heart, unwanted attraction—while their mind or spoken words refuse. In 'Alpha's Captive' or 'Twin Bonds', Regan might feel a pull so strong it's nauseating, yet she'll deliberately turn her back or provoke them to prove her autonomy.
Another layer comes from contrasting the twins' reactions; one might get cold and vengeful, the other desperate and pleading. That imbalance forces Regan into a tricky emotional space where she's not just saying no to a bond, but navigating two distinct personalities she's inherently tied to. The tension isn't just in the refusal, but in the sustained consequence—the pack shunning her, her own wolf howling in protest, the constant, aching proximity.
What sticks with me is when the rejection isn't clean. She might waver in private, clutching a shirt that smells like them, then steel herself. That push-pull, drawn out over chapters, makes the emotional stakes feel visceral rather than just a plot device.