Something like "once you leave me there is no more booby until the oven timer blings" - and then setting it for an hour or more. Or just doing your other things, and being willing to say to DD "you have to wait until the washing is hung out and the dinner is cooking and I've finished reading stories to your sisters" Or whatever you want to get done.

Also, she may actually just be wanting to reassure herself that you are there - so giving her a cuddle rather than something to suck might work too.