Do you think you could perhaps be expecting too much too soon from poor little Koko? Not all cats are cuddly or lap cats ....... also many cats are nervous by nature.
My cat Cassie is 12 now and I've had her since she was 6 - 7 weeks. She is extremely timid, gets scared and hides at the slightest noise or if a stranger comes into the house. She will not let me pick her up for a cuddle, her legs will push into me so that she can get away. Putting her in a cat carrier is still a trial even now but we get over it.
I have accepted that that's the way she is and I love her to bits. I have never 'pushed' myself onto her ....... everything has been on her terms. She will willingly jump onto my lap now for a snuggle - but it took a couple of years before she learned to trust me.
By introducing Rajah into your (and Koko's) home has most likely set her back a bit, albeit temporarily. She sees you making a fuss of the new arrival and wonders what has happened .......... did you introduce them to each other slowly over days or did they come face to face on the first day?
I think Koko will need to hear your reassuring voice more in these early days, don't worry about contact with her.......... let her come to you on her own terms ....... and above all, don't expect too much from her.
I wish you all the best with her, she deserves a chance and I hope that one day she will surprise you!
