If her owner is reading this..get a humane trap and bring her inside. Isolate her in a separate room until she gets used to you. Hopefully, you can also get the kittens and get them adopted. Contact a rescue group in your area for help if you can't catch them. Actually, they can probably help you with the trap too. You're doing a good thing for her right now, but from experience I can tell you that little ones who live like she is have a short life. One day they just disappear and you never know what happened to them. She's so beautiful and I can tell you love her, so please try to get her inside ASAP. Also, it will prevent more babies too.