She had come to Parliament to cast her vote for elections to the Committee of Public Undertaking.
When mediapersons later approached her with queries about the functioning of Parliament which is in a state of stalemate, she did not respond.
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Minister of State for Parliamentary Affairs Rajiv Shukla sought to explain her silence by saying "she is unhappy that Parliament is not functioning".
Rekha was nominated to the Upper House in April last year along with cricket icon Sachin Tendulkar and industrialist Anu Aga.
Sachin Tendulkar did not turn up for voting today as he was busy with the IPL season but has said that he will attend the Monsoon Session, Shukla said.