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I don't know how big your living space is, but I can understand why Pretty
is upset. She previously had you and her space all to herself and now she
must share you with another person and share terroritory with other cats.
She tries to go to sleep with you but after an hour or two gets booted out
by the other cats. If you have a large living space, you could try
alternating letting her have the run of your house while confining the other
cats and then confine her while the other cats have the run of the house.

My sister was able to do this with two cats after the new cat starting
having "accidents" on the ottoman. I currently do this with a cat who was
having "accidents" in one spot in my kitchen. The cat is currently not
allowed in the kitchen because if she's in there for even a couple of
minutes, she will immediately have an "accident" in that same spot. At any
rate, my "problem" cat had been living with my mother for the past five
years, and the reason I originally asked my mother to take her was that she
was having issues such as the one you are currently having. The reason my
cat could not get along with a couple of my other cats was because she was
shy and they were intimidating her. Now, my mother is no longer able to care
for her, so I have her back, and the old issues resurfaced very quickly.

I don't know if Pretty is shy or not, but I would suspect she may feel
intimidated. Some cats are meant to be "only cats." The only reason I am not
trying to find a new  home for Daisy (for her own sake) is that she is 10
years old and takes a long time to adapt to new people (she growls and has
bitten people she didn't know). Of course, once she becomes acclimated, the
growling and biting stop, but most people want a young cat who will be
loving and affectionate right off the bat. So, I keep Daisy with me in my
office (one of the bedrooms in my house) most of the time. I set aside times
when I confine my other cats and let Daisy have the house all to herself.
She has her own personal food and water dishes and litter box right in my
office.

I don't know how large your living space is but part of the reason I am able
to get away with this is that I live in a very large house. Because of
territorial issues, the more cats you have, the more room you need.  I know
you don't want to hear this, but unless you have a large living space and
can arrange things to minimize the contact between Pretty and the other
cats, I think you're going to have to make a choice. A 5-month-old cat is a
still a kitten. She has a long life ahead of her, and since it sounds like
she is affectionate, it would probably be easy to place her in a new home. I
know you love her, but the current situation is unfair to her, and I don't
think it's going to resolve.
Best regards,
---Cindy S.

g.gala ' It has been my experience that when introducing cats of any
age and /or sex that they all be spayed and neutured. A young female
spayed cat can smell an un neutured male. She don't trust them, in some
cases I have seen an un spayed female weary of a nuetered male. I
strogly believe in spay/neuturing I have woked with horses & livestock
to housepets. As for an animal that (accidents) in a same spot....no
animal likes to eat where they bathroom...I will place the feed dish in
this spot for any given time until you think you get success.

g.gala ' It has been my experience that when introducing cats of any
age and /or sex that they all be spayed and neutured. A young female
spayed cat can smell an un neutured male. She don't trust them, in some
cases I have seen an un spayed female weary of a nuetered male. I
strogly believe in spay/neuturing I have woked with horses & livestock
to housepets. As for an animal that (accidents) in a same spot....no
animal likes to eat where they bathroom...I will place the feed dish in
this spot for any given time until you think you get success.

g.gala ' It has been my experience that when introducing cats of any
age and /or sex that they all be spayed and neutured. A young female
spayed cat can smell an un neutured male. She don't trust them, in some
cases I have seen an un spayed female weary of a nuetered male. I
strogly believe in spay/neuturing I have woked with horses & livestock
to housepets. As for an animal that (accidents) in a same spot....no
animal likes to eat where they bathroom...I will place the feed dish in
this spot for any given time until you think you get success.