"On behalf of him I am saying sorry," said Nandini.
The controversial comment had triggered an uproar and sparked condemnation by opposition parties with CPI-M demanding that the Lok Sabha Speaker take suo motu cognisance of Pal's outburst and disqualify him.
Trinamool Congress on Tuesday demanded an explanation in writing from the party's actor-MP within 48 hours for his comment.Watch video: Tapas Pal's wife apologizes for his rape remark
"The statements made by Mr Tapas Pal are utterly insensitive. The party does not in any way endorse what he said many weeks ago, which is being played out on TV channels," party spokesman Derek O Brien had said.Read: Trinamool MP Tapas Pal threatens CPI(M) women supporters with rape
The MP's comment also drew condemnation from the National Commission for Women.
Pal's comment which went viral on a vernacular TV news channel on Tuesday had quoted him saying, "If any CPIM man is present here. Listen to me. If you ever touch any Trinamool Congress worker or their families at Choumaha, you have to pay for this. Don't try to act smart with me. I am smarter than you..."Read: Women's panel demands Trinamool MP's arrest for rape remarks
"... Earlier, you guys have bullied me on various occasions. If you insult the mothers and daughters of Trinamool workers. Then I won't spare you. I will let loose my boys in your homes and they will commit rape. I will teach each of you a lesson," the MP had warned.Pal, however, denied that he spoke about rape. "What I said was I will tell my workers to 'raid'."