Is “After being placed under house arrest, Cao Shuang borrowed grain from Sima Yi and called himself a rich man.” true?

In Chapter 107 of the novel Romance of the Three Kingdoms, it is written that after Cao Shuang was placed under house arrest, he borrowed grain from Sima Yi and, throwing down his sword, sighed, 'If I had not raised troops, I would have been willing to give up my office, but it would have been enough to be a rich man!' The main text of Records of the Three Kingdoms does not contain this record; it only states that he 'attributed his guilt and begged for death, then communicated the memorial to King Xuan' and subsequently 'excused Shuang and his brothers, returning them to their residences as marquises.' The borrowing of grain and the words 'rich man' actually both come from the 'Wei Mo Zhuan' and 'Wei Shi Chun Qiu' cited in Pei Songzhi's annotations.