My independent cat is suddenly clingy and aggressive. Is she pregnant?

As with any sudden behavioral change, an exam to rule out any health issues is always the best first option. If the weather is changing rapidly and you are seeing her seek out warmer spots such as blankets, by heater vents, etc that could also be related to the behavior. Adding a warm blanket out of the dryer to her bed, or providing a place for her to sleep near a heater may help. However, if you are concerned enough about the change, a vet exam for a bit of peace of mind is always good.

There could be a reason for Aspyn's change in behavior. Sometimes a sudden change behavior can be a sign of a medical illness. I think it would be a good idea to have her seen by a vet for a health check.

She is likely to become more protective when the new born kittens arrive and it is unlikely she will become more accepting of the older kittens at this stage. Ensure she has a quiet area to have the new kittens undisturbed y other cats (including her previous offspring)

Sudden strange behavior changes can sometimes indicate underlying pain or illness, so it is a good idea to schedule a checkup with your vet to rule out any health issues. If your cat is not spayed and is also leaving the house, it could be that she is in heat or is pregnant, which is why she is trying to separate from her old litter (I assume this is what you mean by her kids) to make ready for a new one. Having her spayed and keeping her indoors may help if this is the case, as well as making sure all the cats have their own access to food, water, litter, bedding, etc.

Since she was gone for so long, an examine with your veterinarian would be recommended. This may diagnose any underlying injury or infection. Frequently, either can be responsible for a sudden change in behavior. In the meantime, give her space and time to reacclimate to you. Don't force her to be held or pet. Offer treats and praise when she comes close. A pheromone product, such as Feliway Spray or plug in diffuser, may help to decrease any anxiety.

Hi there. Luna is probably preparing for motherhood. All sorts of hormonal changes are going on in her body at this time, and can cause her to behave differently. Pregnancy can also be very uncomfortable, as you've said. The best thing you can do is pet her and reassure her you are still there and her friend. Congrats on your kittens!

Aggression can often be a response to pain. I recommend getting her checked by your vet as soon as possible, especially since she just finished a heat cycle. She could have an infection that is making her uncomfortable and in turn making her lash out against the kitten. You vet may run some labwork, do a physical exam, and based on these results, will be better able to tell you what is going on with your cat and how to treat her from there.