Actually, Kerry draws the line at lap-dancing. Because, you know, that shit's crass. But topless glamour modelling? What's wrong with that?
Nothing, if you ask Kerry. After all, she did it: 'Mummy got her tits out for a living. But they were good tits in those days - they might be a bit saggy now.' But if one of her daughters wanted to be a lap dancer, that would be too much: "if (she) said she wanted to be a lap dancer, I wouldn't agree to it." Oh, good.
So there you go. As long as your tits aren't saggy, why not put them display? And if you do, or did, put them on display, it would just be hypocritical to tell your daughters not to do so, too. Right? Of course, it would then be similarly hypocritical to tell your daughters to not, say, do drugs, or talk about their sex lives publicly, but why split hairs? The point is, Kerry's got boundaries. And if that boundary lies somewhere between posing naked and simulated sex on some perv's lap, who are we to quibble?