Ahlul Bayt (Ahl al-Bayt) or household members of Prophet Muhammad (pbuh) refers to his daughter Fatima Zahra, his successor and son-in-law, Imam Ali, their two sons Imam Hasan and Imam Hussain, and the nine Imams from the lineage of Imam Hussain.
The Sunnis are far more patriarchal in their structure. The 'man' is the household. The Shia grow up believing 'family' is paramount in the concept of religion. That sounds very "Western" to me.
