Neighbour then said, "We think she's pregnant."

I would say something, would just come out I’m afraid, in a nice toneMarySkater wrote:I don't feel I can really interfere unless they do ask me to take a kitten. (Maybe they'll get lucky and their cat isn't pregnant after all - she's not bulging at the moment. But I wouldn't count on that.) But if they do get stuck with a litter, I thought maybe I could print them out an information leaflet from Cats Protection or similar, something to detail how often a female cat will breed. And add the phone number of the local CP, who can assist with neutering costs if the family are low-income.
I just looked up my vet bill for getting Ria spayed, 18 months ago. £66. Really, why would you NOT do it?!