You quietly crawl through the airduct being careful not to draw attention to the tenants, even though it's too small for a chakat to crawl through but they can easily grab you from through the grate. You stop at the grate in which your neighbors lived, the ones you sent you the box and it's just as you fear, Jack and Caitlyn are chakats, Jack has orange fur while Caitlyn have brown and it's like the scene from outside your window and you overhear their conversation
Caitlyn: Do you think Charlie(you) opened his gift?
Jack: I'm sure he has by now, thanks for coating the dildo.
Caitlyn: No problem, by now he's used it and now is one of us and extremely horny.
Jack: Tell you what, when we're done with this, let's go over to his apartment, we'll have a 3 way. How's that sound?
Caitlyn: Oooh, that sounds *purrrr*fect.
Having heard enough, you continue down to your girlfriend's apartment quietly, you manage to find your girlfriend's apartment you open the grate and enter his living room and you find your girlfriend.