Sameer did ask Khali several times about his choice of playing Manojwa. It was Khali who chose Manojwa but I guess Dolly was sad that Shweta chose to play Ashmit-Sameer and not her.
Dollwa probably didn't want Ashmit to play her. She hates his guts.
It was Dolly who created the whole drama but then that's why she is there. It was fun though. π