Take the tour ×  Why did they Have relations with Their Father?
share|improve this question add comment  1 Answer  up vote 2
down vote accepted  1)They thought there was no one left in the
World(Ibn Ezra and Kaspi,Rashi and Rashbam)  2)Radak says they
thought no one would marry them since they came from the
destroyed cities they would be outcasts  3)Seforno has the Most
intriguing answer they held themselves to have a great Yichus
and there was no one good enough left to Marry.  share|improve
this answer add comment  Your Answer