Bikash_P, again, I was asking for an authentic refrence which obviously have no idea what that mean. Instead you've shared a cartoon that someone who has no idea about Islam made up. Actually in Islam you cannot marry your daughter-in law. Father in law is considered a mahram, someone you cannot marry.

http://en.wikipedia.org/wiki/Mahram

Please educate yourself before you talk about subject you are not familar with.