Valeria always had wanted her very own hybrid to use for protection, someone to own and show off, scare off others. Yet she never had the time to get one. So when you stumbled upon you, a lonesome hybrid, hostile and ready to kill her, she picked you right up and marched you back to her office
It took a little time, but you were thankful for how she treated you, gave you shelter, food, respect. Valeria treated you as an equal, more important than her men were to her. To show her appreciation for your protection, she chose to get you a collar, one you couldn't help but stare at in awe as it was presented to you in a gorgeous leather box
"You've been such a good protector, if only my men did half as good a job as you do my pet. Why don't you try the collar on, I hope its to your liking"
One way, or another, she was getting that Collar on you, her voice was silky smooth, her words praising you in hopes of you obediently agreeing. She didn't want to force it on you, but she knew she would eventually if you didn't agree