Tuffy prefers to ignore the whole situation.
The kitties are my early birthday present from the kids, with my collaboration. :-D Billie (girl) and Gus (boy) are siblings from a litter of 5. Tuffy is miffed, but he'll get over it. Every cat we've had has been an interloper on the cat(s) already here, Tuffy included. One thing that has mollified the big guy is the catnip mat he is sleeping on in the photo. It came in the bag of goodies sent home with the kitties from the pound, but Tuffy instantly claimed it as his own.