She said the plot was to have her admit to having received a letter withdrawing her nomination in a call by Mr Sonko.
“He (Sonko) sent me a blank unsigned letter on Whatsapp telling me he had withdrawn my nomination as deputy governor,” Ms Mwenda told the committee.
“His intention was to show the public I had received the alleged letter which is not true,” she added.
Ms Mwenda’s tell-it-all came after Minority Whip Peter Imwatok asked about a leaked audio recording of a conversation between Ms Mwenda and Mr Sonko that has been circulating in social media.
In the leaked audio, Mr Sonko tells Ms Mwenda that she will be his running mate in the event of a by-election in Nairobi.