Well, the entire first half of the story was leading up to this moment at the three month mark, just as G had told D, once the three months were up the Puppy needed to be in line. And in all honesty, G always knew that he'd find an excuse to use against the Puppy to kick him out of the house, it had just been a matter of waiting the three months out. However, the Puppy never knew what the three month rule was from the beginning, he figured that after the first two weeks of him not being sent away that meant he would stay with them forever, just as D had promised him. So, when he hears G telling D that it's been three months and the Puppy hasn't matched a single one of his conditions that it's time for him to go back to the pound. Obviously D fights G against this, knowing he's being harsh and stubborn, but the Puppy refuses to listen to the rest as he starts sobbing, pulling their attention to him in the door frame peeking in from behind. And he sobs about how they never loved him to begin with and as D tries comforting him, he shoves him away and runs down to his bedroom, packing his suitcase so they don't have to do it for him. In that moment he "knows" that he's destined for a breeding center, so he doesn't pack much, but at the very bottom of his suitcase he puts a picture of what was originally the three of them, but now it's torn down the middle with only him smiling so he can always remember what he looks like, so he doesn't lose himself. When he finally leaves his room again, he tots his suitcase and holds a brave face, while D tries to reassure him that he's not going anywhere that G is just being an asshole like always. And even though in the end, he does stay there, because that's his home, it begins another cycle of trust issues for the pup that they need to work through which is very difficult. This is four or five months before his heat with G, so it's a long grueling process of getting the pup to trust them again, a lot of back and forth.