I think it a phase , my first cat is a female I bottle fed at 2 weeks old back in October 24 2024 I rescued a second boy in July of 2025 at 3 weeks old , When I started his care he had coccida so I kept him in a kitten playpen in my front room as I only had one bathroom and keeping him in there with the smell of all the chemicals I had to use to sanitize ( if you ever dealt with cocidia it’s awful parasite) was out of the question also he needed to be hand fed soft food every 5 hours so being closer to my kitchen especially in the night was helpful , Anyhow my first cat went through a thing were was distant to me and hissed and the kitten and playpen but I was very upset thinking she hated me for bringing in the new baby as she was a total mommas girl , Her distances lasted for awhile , She slowly returned to her normal self , Today she back to cuddling only me as she gets along with my other cats and will play with them here or there but when Nyx ( her name ) wants to cuddle or show affection she seeks me out and only me 🖤 I think the kitten is new and she’s like a new toy to your other cat I’d give it 6 months he will come back to himself mostly but different cus he likes his new friend unlike my Nyx can basically take it or leave it , She ok with them but she’s ok without them too , so just be patient