bioluminescent spray trap?

Are you sure it's a female cat? If it is a male, then chances are the cat is just using your father's business as a home.

There is a good chance there are kittens. Not sure on that paint, but it is basically "glow in the dark" paint. Follow the cat to its spot and then when the cat is not inside, snoop around to see if there are kittens. If over 3 1/2 weeks (mobile and eating cat food), you can collect the kittens and avoid more unneutered animals in the same area.

Once kittens are around 4 to 5 weeks they will begin following the mother cat to any food you leave, so put some food out on a daily basis, and then watch. Canned food will be more enticing.

If you don't place food, she may take the kittens out with her and teach them to hunt, thus ending up with more unspayed animals to reproduce in the same area. This can result in a large feral cat population. If there may be kittens, you need to move quickly to capture the kittens before they are so mobile they are out of the building.

Get mother cat spayed, once any kittens are weaned. You can find low-cost spay clinics through local Humane Societies and many do this for about $35 to $40. Some will even offer "humane traps" to borrow to catch the cat and then bring her in for spay.

If you catch the kittens near about 5 weeks, you can tame them within one week, if the mother is feral and then have perfectly fine house pets. Separating the kittens from one another hastens the process. 

Small kittens tame very easily if placed in a small area such as a bathroom. Then, feed multiple times per day. If kept in an open area, they will take much longer to "tame".