The favourite bahu's donning a business suit and mouthing dialogue that rubbishes the great Indian joint family? Smriti Z Irani laughs gaily as she rehearses for her play that's going to be staged for the first time in Mumbai, in which she plays a character that's as unlike Tulsi as chalk and cheese. Proceeds from the Mumbai show of <em>Kuch Tum Kaho Kuch Hum Kahe</em> will go towards a water project, a cause she says is dear to her heart <strong>On Kuch Tum Kaho Kuch Hum Kahe</strong>