Would a son's marriage be invalidated if his wife were forced to lie with her father-in-law for 25 years?

The claim of a woman being forced into adultery for a quarter-century is a fantasy and a deception; continuance for 25 years is unreasonable and raises questions about her not informing her husband or family, or not escaping.

Adultery with a son's wife is forbidden by Islamic law and is among the gravest sins, with its punishment being death in all cases according to some scholars.

The adultery of a father with his son's wife does not invalidate the marriage, according to the preponderant opinion of scholars, contrary to the Hanafi and Hanbali schools of thought. This is the view preferred by Al-Shafi'i and some contemporary verifying scholars, because adultery is not equated with marriage in this matter.