The owner of this house is in a coma; the woman who comes to see him sometimes always makes herself known immediately if she's here, but given that they've been left alone so far, K can safely assume she's not.

K manages to subdue Mango by rubbing her sides and then her belly when she rolls over in his lap just like she likes, and instead of agreeing that she's his, what K says is, "This is Mango. She's the one Sara wants me to adopt."