and not keep nagging and nagging until mum says yes????

and how do i deal with it? I get it from DS the most, but DD does it a bit too. they ask for something, etc, I say no, and so they "Mum please, please can I....?" and DS is the worst, he will stand there and just nag and nag for ages, and then it turns into a big fight because i eventually get the poops and get angry at him, and then he gets really upset at me. Grrrrr!!!!

So just wondering what age this stops? LOL.

and how best to handle it? i've just started threatening time out if DS continues to do it, because he's just not listening to me.......and i wish i could explain how relentless DS is .......