So, a neighbor is an old cat lady in the sense that she feeds all the stray cats in her backyard, which is adjacent to mine. She doesn't live on my street but our all backyards are all connected with an alley between them for utility access or w/e. It's in the city. While they eat in her backyard they happen to crap all inside mine, including on the stairs that lead out of my basement. It is a continual thing. Getting her to stop feeding the cats isn't really an option. She puts the plates out there and she has names for them and specific places for each of them to go and whatnot. There's no collars on any on them and they are all feral.
Anyway, today when clearing out trash and sweeping and such, I happen to notice huddled in my basement landing there are two kittens. Really small ones. Fortunately, I did not discover them from opening the basement door. The slight chance of me doing so and having one of the cats run into my house keeps me from using that door. In any event, I need these kittens gone. I do not want to touch them as they are likely very young (visually looked to be less than a few weeks, under 12" eyeballing them), and they didn't respond much if at all when I went to move my trashcans and such (edit: they also did not move when I knocked on the door from the other side). When I came back a second time I did see the mother, which ran away, so I am assuming they are not abandoned.
While I have a cayenne spray and various other deterrents, given the age of the kittens my removing them would likely result in them dying. I do not want dead kittens in my backyard, nor do I want to deal with the complexities of removing said dead kittens. Assuming the mother cat decides that this is totally a safe place to keep her kittens, how long will I have to deal with them being there? Do cats move their kittens during the day or something so I can nuke the area while they're gone, would the mother cat still try and stay there? I'm thinking of using the coffee grounds.