Clad in yellow silk saree and carrying a golden handbag, Rekha walked in the House during Question Hour.
She quickly took her allotted seat and was seen exchanging pleasantries with fellow members.
The last time Rekha had attended Parliament was on May 7 when she turned up to cast her vote for elections to the Committee of Public Undertakings.
Rekha was nominated to the Upper House in April last year along with cricket icon Sachin Tendulkar and industrialist Anu Aga.