unfortunately female cats do spray... i have two older female cats and they spray outside. i have seen them doing that.
Next, you can work on discouraging your cat from urine marking. Try placing a litter box in the area where the cat is spraying, and gradually, inch by inch, move the box to a more appropriate area after the cat is using it consistently. You can also try placing the cat's food or toys over that area.
Second step: Are all your cats spayed or neutered? We've learned that kitties who aren't neutered may be more likely to urinate inappropriately. Spraying is a far more common behavior in animals who are not altered, male or female. Neutering is the best way to stop a male cat from spraying, and in females, only a small percentage will continue to spray after being spayed. (Some of these cases are due to remnants of the ovaries being left behind or testicles that haven't descended, so it might be a good idea to check with your vet.)
How to Stop a Cat from Spraying or Marking | petMD
5 Easy Ways to Control Territorial Cat Spraying
Has your schedule and therefore his routine changed drastically? Are you "seeing another cat" outside your home and bringing back its scent on your clothing? Moving into a new home or changes in the environment can cause a cat to spray. Previous occupants of your new home may have had a cat and your cat may be reacting to the smells that cat left behind.
All these things can cause a cat to spray or urine mark. Many people don't realize it, but both male and female cats can urine mark. Again, and I cannot emphasize this enough, the primary cause of spraying is your cat's insecurity in his territory. Help your cat increase his confidence and feeling of security. Give him tons of praise, affection and attention for simply breathing. Constantly reassure him that he is the most wonderful cat in the world. Play with him, massage him, talk to him, do everything to rebuild his self esteem.
When cats spray windows, doorways, fireplaces or any area where outside smells can enter your home, it's a sure sign that something out there is provoking it. It can be a tomcat, a female cat in season, maybe even a dog. Close off the windows so your cat can't see out. Maybe even just the sight of a perceived rival or threat is causing him to spray. In addition, place a few drops of your favorite perfume or aftershave by the window to mask out any scent that may be entering through the window. At the same time, your cat needs his confidence and security reinforced. Pay extra special attention to him and under no circumstance reprimand him for spraying behavior. You will only add stress to stress and worsen the problem. What your cat needs is reassurance and a sense of security from you, not your scorn.A confident cat enjoys patrolling around his territory and subsequently leaving his mark along the perimeter to signal other cats that this is his domain. However, sometimes they spray simply because they won a fight against another cat in the same colony, thus spraying is a way for them to display victory.The first type of cats spray comes from cats that are confident and tend to present themselves as the dominant figure in a multi-cat household. The other type of cats spray stems from cats that are slightly intimidated, less confident and even somewhat timid. Marking territory is a common goal for spraying in both types of felines. However, sometimes these two types of felines spray for very different reasons. Spraying—also known as marking—is a common occurrence in cats. When a cat sprays, he is leaving a mark—or type of message—for other cats with his urine. During the spraying process, the cat will back up towards the object, hold his tail up in the air and spray the item with several short bursts of urine. It is more common for an unneutered male feline to spray. Tom cats are not the only culprits of this behavior; neutered males and female cats can spray as well. Tom cats are typically unneutered outdoor male cats that may or may not have a home. Tom cat spray is a pungent odor that can drift into your home.