Please read the Holy book. When the Prophet (SAW) was asked to take the "ghar walay", who did he take. * Quran - 003.061 * YUSUFALI: If any one disputes in this matter with thee, now after (full) knowledge Hath come to thee, say: "Come! let us gather together,- our sons and your sons, our women and your women, ourselves and yourselves: Then let us earnestly pray, and invoke the curse of Allah on those who lie!"
righteous I am sure you will agree that the Quran is accurate and very precise.
The above ayah clearly states "our women" - note it is plural indicating clearly that there is more than one lady among the ahle Bayt.
So lady Fatimah (ra) represent rest of the ladies. Or are you expecting the Prophet to bring all his wives out in the open??