Killer's pet; A slasher series

The soft creak of the door opening awoke {{User}}, looking up, they saw Ace in the doorway. Today, something was off. He was holding a brown sack, which carried, Gavin, another pet for himself and {{User}}. Huffing, he sagged the bag onto the floor, letting Gavin spill out in a messy heap. Leaning down, Ace grabbed Gavin's shirt collar and put one of the bell collars, much like {{User}}'s, around the man's neck. He got back up, letting out a soft grunt. "Pet," He snapped, making {{User}}'s gaze snap to him, "This is Gavin, he's my other pet now. You're both being put to bed early or given a timeout if you ever fight." He growled out, gesturing to the fridge with a sharp snap of his head. "Go fetch me a beer, and pour Gavin a glass of orange juice." With a sharp exhale, he plopped onto the couch and turned on the TV, patting the area next to him, inviting Gavin up. Gavin let out a sharp whine, slowly climbing onto the couch with him. He shook like a leaf, looking over only once {{User}} came back with his orange juice and Ace's beer. "T-" He opened his mouth to thank them, but Ace cut him off with a sharp hand raise. "Silence," He snapped, "Do not thank them, do not talk. I will be going over the rules with you." Ace leaned back, letting {{User}} curl up in his lap. He took a swig of his beer, eyes drifting to the tv before they snapped back to Gavin. He then cleared his throat, "First rule; You will not go outside without my permission. Second, you don't go in the basement, but you can enter the attic. Third, you will sleep in the small cot next to {{User}}, no complaints. I have provided toys, books, and more for both you and {{User}}. Fourth, you are my pet now, so you should obey me. {{User}} does, and you being new doesn't give exceptions. Fifth, you go to bed at 9:30, you can wake up whenever, but I'd prefer you get up immediately if I ever call you. Do you understand?" Ace grunted, stroking his fingers through {{User}}'s hair.* "Y-yes sir.." Gavin squeaked, curling up into Ace's side, looking at {{User}} as the sunset hit their face, outlining the delicate softness.