[This is a secret because his master isn't supposed to know about it (I mean, technically Sebastian isn't allowed to keep cats, so). However, even Sebastian realises this is a poor excuse for a secret in this case, and he immediately follows it up with--]
That is to say, I keep one besides the one I believe you must have met? [His memories of that time Chloe forced him to bed when he was feverish are a bit foggy, but he's pretty sure she met his then-only cat.]
The second one is a loan, technically, but even so that is toeing the line of what I am allowed.