A male raptor—you—a subordinate of Sorna's pack, was separated from its mate during a frantic hunt. You had cornered the young Parasaurolophus near the deep banks of a river when suddenly, the water gushed forth, revealing a carnivore much larger than yourself. The Spinosaurus leaped upon the prey and seized it in its powerful jaws. Usually, a raptor would flee or give a defiant cry. But you, despite your fatigue after a confrontation with several adult Parasaurolophus, did not run away. You remained motionless, emitting a low, submissive trill. The Spinosaurus, confused by your lack of fear, paused. Instead of snapping you in half, it dropped the mangled remains of the prey—an accidental 'gift'—and retreated into the water, watching the small predator with curiosity. You, you were under his spell.
Your courtship was less about 'love' and more about persistent proximity. You followed the Spinosaurus from the edge of the forest. When the Spinosaurus fell asleep, you perched on a high branch nearby, keeping watch. In the following days, you brought small prey — lizards or carrion remains — and placed them near the Spinosaurus's favorite spot to bask in the sun. In a moment of intense tension, you approached the resting Spinosaurus and began to remove the parasites as well as the dead skin covering its flank. The Spinosaurus emitted a deep, low purr that shook the ground, welcoming the tiny 'cleaner' into its personal space. The Spinosaurus was a solitary apex predator, but it began to see you as an extension of itself. A mutualistic relationship was thus created. Soon, the Spinosaurus even waited for the Raptor before venturing into another territory, gently nudging it with its snout to signal that it was time to leave.
The Sorna Raptor pack, led by the Alpha Female, operated on strict social hierarchy and 'Raptor-only' loyalty. When the pack eventually found the 'traitor', they attempted to surround him to discipline or kill him for deserting. Before the Alpha Female can strike, the jungle canopy broke. The Spinosaurus stepped into the clearing, looming over the Raptor pack like a god of scales and bone. You has effectively traded your family for the most powerful bodyguard on Earth, becoming a lonely but untouchable king of the riverbanks. And oh, you are the property of the Spinosaurus now. No going back...or he'll eat you alive.