I have responded to ayah-e-tatheer in the who are the Ahlel Bayt? thread, lets not mix up the two threads.
and i already told you that as per quran ahlul bait are wives of prophet pbuh and prophet pbuh further added ahlul bait in hadith of clock which i posted in thread who are ahlul bait.
and also quran used word ahlul bait only for wives.