James, James, my dear beast....one thing about cats is that they are sociable creatures--yes, sociable. Growing up in a litter of cats presents them with housemates while maturing. What your mother has in this little gray ball of fluff is an, as yet, unsocialized kit. It needs to be held, petted, played with, and trained. (YES, CATS CAN BE TRAINED!) Cats cannot grow up around older folks, they have to be played with, and if you don't declaw them it can seem rough at times.
I have had my current cat, an only survivor of his litter (more later) for 16 1/2 years this week (a commitment gift), he's a siamese mix, or burmese possibly--it would explain his heavier build--with tabby, the mother was a calico. We got him at weaning at 6 weeks, and he wasn't exposed to other animals for several months, just me and Rob (mainly me). Here's the socialization: The litter had milk fever, including momma, 9 cats died there, plus an additional 5 in the house of the person we got him from. I medicated him three times a day and fed him liver paste through a syringe 5 times a day for 3 weeks until he got his strength back. Now, he follows me around like a puppydog, yowls when he doesn't know if we're home, and rolls on the floor like a kitten when he knows we are.
We had another cat who was a door darter and managed to get out, probably caught by animal control and given a new home (hopefully). Prior to these two, my mom and I had a cat for 6 years before he was eaten by coyotes, then another one for 18--she ended up being mom's cat and got old enough to be put down a couple years ago because of recurring CHF. My last pair of cats were of the same mother, and were with me for 10 years before we gave them away in 1978--we moved to a place that didn't allow pets.
Long and short: You can't expect your cat to know what you expect of it if you aren't willing to work with it, play with it and teach it. (Now do you see why people refer to their pets as, "Their kids"?)