Kind method
Outside cat just buy 1 bundle of cheap cat food from pet store, feed them maybe 3 times a day.

Later they will move on. Cat they come and go, some months for many cats, suddenly all go missing (probably poisoned).

More cruel method
Buy white vinegar bottle and pour near them, sure mother will bring the babies to another place fast fast

Can also spray water on them if you have no heart. Later they shiver, mother will also cabut fast2 with the babies

Just ignore. No food, no water. They'll move on to some other place.

last time got one mother cat with kittens, everytime I walk pass by, stare at me and grr grr growl at me in my own property.

what the heck man, no respek at all, I chase out.

bugger this mother cat, next time come back again, eat its own offspring, cannibal cat.

Everytime i see this cat, I chase far way

some more kill dead rat from outside far away, and bring back half eaten carcass to my backyard.