You are so sweet to do all this for this momma kitty and her babies! Thank you for that, the world needs more people like you.
I too wonder, sadly, if a predator didn't get that baby kitten
. I hope I'm wrong. It is possible that the kitten wandered near someone and they picked it up. Most cat people that saw a helpless kitten that young wandering around would try to trap it, and with food and a kitten that small, I would think it would not be that hard to do with a cage. So I wonder if that is possibility, someone found that kitty and took it in. At least it is better to think of that than the alternative, that something horrible happened to it. Just yesterday at Petco, someone brought in a tiny 5-6 week old kitten from the parking lot that had wandered off from who knows where, no momma in sight, it was dirty and oily, but it was fat and healthy, so you know it's momma had to not be far off, but it is possible that kittens wander off, and this one didn't want to be handled either...it was stuck up in a big truck near the spare tire and someone had to climb under the truck to get it out....if he'd not heard the mewing, he would have driven off with it there.
I think it's possible you might be able to get the momma cat to come inside your house, but if she has never been in a house before, she might freak once in there. You may want to leave the door open first so she sees that she can go out if she wants to. I think if she has a good experience coming in at first, and she walks around and sees that it is safe, you give her some food, make it a pleasant experience, maybe she will come back, maybe with the kittens. I think once you got all of them inside, I'd keep her confined to the room you set up. She will probably be upset at first and howl like crazy to get out, but I would not let her out until you are able to get her spayed or she'll end up like this again. Hopefully if you get her in the enclosed room, and you just casually put a small cage or carrier in there with some food, and just be nonchalant about it at first, put a small blanket or bed in there, she will get comfortable going in there and then you can shut her in and get her to the vet. If you have a chance to get those kittens inside, with or without her, I would get them in there.
You are wonderful to take this on! Maybe your vet or a rescue can help you find a home for the babies....or maybe you will end up keeping one? Two cats is always better than one, one and they get bored and lonely. I think this momma is so lucky to have you, you are a guardian angel to her right now.
I have a feral that it took me many months to be able to pet her, now she loves me, lets me pet her, but she will have no part in letting me pick her up. What she will do....and this has just been very recently, I lift her up under her front legs, but I don't lift her back legs off the ground. I usually do it right when I walk outside, when she is the most excited to see me and happy and mewing and purring, and I will sort of do this half lift, and she is letting me, after about 15 seconds, she starts to squirm to get away. I once tried to lift her up completely, and she freaked. She didn't bite me, but it scared her, so I have not tried again, and I am not sure I"ll ever get to that point. I did have success sitting in a chair with treats and she jumped into my lap and ate the treats and jumped down, and she has done that one other time, but she has never settled in my lap. She will lay across my feet though, in the chair I am in. Small steps. This has all been over a year that we have gotten to this point, from hissing and running at first, to now this, so I'm happy. She is already spayed, a TNR with a tipped ear, and I have 3 inside cats, and this girl has in interest in coming inside, so I love her as best I can as an outdoor cat.
I can't wait to hear more about your kitties. You sound like you will be a wonderful cat momma!