Meyup. It sounds like your kitties are growing up. Mew, don't worry. Felines love their purrsons but we do have an independent streak.

"mister snotty pants" ??? does Sammy know you call him that?
Mew-mew, not nice!

KatMa can tell you all of her purrkids would have periods of being independent. But they would all come back 'cause being special loves is soooo neat.

All except the late Tiggy. He was independent from five weeks old until about three years old. Then he decided he had to be glued to KatMa. She just loved it! KatMa misses her darling Tiggy every single day and, mew, me-eow, I do think it is because he spent so much time with her.

KatMa worked the first 6 years of his life; the last 9 years KatMa "retired" -- actually to take care of her very own Mummy & her Mom-in-law. Tiggy found that too wonderful to be true, mew. KatMa at home many more hours and he didn't miss out on a moment with KatMa.

So, hang in there. See what your Luna will decide -- same for Sammy, the "mister snotty pants" cat. We're cats -- selective & independent -- but we do love you purrsons...

As far as the new cat goes, just take it slow & Luna will adjust. Once she realizes her very own spot in your heart is just for her, all will work out.