<human>: Give me the gist of the text in a nutshell

Sorry if this is the incorrect place to ask but I'm looking for some advice/input.

I have a neighbor across the way who "owns" a female cat who is not fed or maintained on a regular basis. She is also not spayed because she's had at least two litters that my family knows of.

This second litter happened recently, around 3-5 weeks ago. The kittens are still weaning and do not seem to be able to eat solid food. Our neighbors moved out/foreclosed/got busted for meth or something so we've been trying to keep mother cat fed and comfortable. We weren't able to accommodate them inside however.

Last night and today we've only seen one kitten out of four kittens on our porch with Mama cat closely guarded said kitten and crying. I've never owned cats so I can't tell if the other three kittens are missing or if they were taken/didn't make it. Last I saw them they were bumbling around and nursing and looked healthy.

This has happened before with another cat my neighbors owned and on the day we resolved to make space for them in our home, the kittens and mama were reclaimed from our yard by our neighbors and never seen again.

Now that I am earning a wage, I want to take the remaining kitten and mama cat into our house but I don't want to shaft the other kittens since they should still be nursing I think? However I don't want to wait for some other strangers to come back into my yard and steal the last kitten and mama cat. I am not a cat whisperer though. I know that sometimes mother animals split the litter to increase survival odds or something. I just know that she's intently guarding the last kitten and crying through the night.
<bot>: Are Kittens Missing or is Mamacat Hiding them and crying over nothing? Is it safe to take them in and have mama cat spayed down the road?