inbreeding of cats

Question
I have 3 cats, 2 brothers and 1 sister.  I am afraid that the female is now pregnant by one of the brothers.  Is this bad?  Should I abort the pregnancy?
Thanks
Kim

Answer
Kim,

It is not good, depending on her age, but it is not necessarily bad.  I would seriously consider having her spayed as soon as the kittens are weaned.  You can neuter the males immediately.

There is no need to abort the pregnancy!!!!!

Best regards... Norm.