In my case (Lucia & Samuel), that's basically "always" - every time I fast travel to my homestead one of them would run to me and ask for something. Well of course they'd give me something sometimes. I wonder if there's a greed meter on them - or are they too spoiled? Is there an in-game mechanism controlling the frequency?

Anyway, what's your case?

In fact I've been trying to catch them arguing (it happened once but I'd like to see it again) but...you know it's not possible when one of them keeps seeking out for me.