Hybrid Cat Questions

Last fall, a pregnant cat walked into the building and gave birth.
She was black with the typical yellow eyes and the father was an
unaltered Siamese (I presume) that was also hanging around in my
garden at the proper time.

I have one cat from the litter. She looks Himalayan Persian and is as
about a pretty a cat, as cats get. She is about six pounds (10 months
old I guess) and needs artificial tears and antibacterial cream, as
her eyes are very different. They are small, slanted and blue. She
sees ok, and so far her eyes are clear. I was told both she and her
sister would go blind and that I should have them destroyed. One
problem she has is that tufts of hair get on the eyeball, although I
try and rub her hair away from her eyes. She is very long and very
soft. Her hair is short for a long hair, but definitely long.

When she and her sister were small, they would run sideways on their
back legs for 10 to fifteen feet. It made an uncommonly pretty
sight. When she is on alert, she stands on her back legs, like a
groundhog or prairie dog. She can jump up straight into the air, maybe
three feet, if she so desires. Usually, that is when she is batting
at something. She sneaks outside a lot, but does not usually go
far. I call and she rolls on her back exposing her belly.

She was a very late nurser. I ran out of food and switched brands,
when she and her sister were about three months old. They were almost
weaned at the time. Her sister was smaller and harder (that included
her claws as well as her body) with the same eyes, but medium black
hair. They both went back to nursing, and by the time I noticed, her
sister was spitting up milk (already too mature for it), and
consequenty died. This one nursed for an uncommonly long time; her
mother left my household over this. She went back to eating regular
dried food, first with the kind she had originally refused. Her
mother had to leave, before she did this to any extent. By this time,
the whole nursing process was completely public; I could right up to
them (an inch way) and neither one of them blinked an eyes.

The cat before this was a hybrid male, whose testicles never
descended. He was half Himalayan and half alley cat with Himalayan
hair and coloring, except for white socks. His mother was the alley
cat. He lived about fourteen years and made a nice pet. He was on the
timid side (when it came to unaltered cats in the garden, but of
normal weight with a definite advantage over altered cats.

Am I describing a hybrid cat? I remember her sister as being both
smaller and stronger.