Friday that she would put up the cash for every person who backed her pledge on the social networking site by 9pm.
Within around 35 minutes her message had been repeated more than 14,000 times - and the Slough MP called a halt with the total at £14,268.
She tweeted: "Ok stop now I owe comic relief £14,268. Phew! Cheque soon if you don't believe me check with comic relief."