Folklore generally doesn't have stories that involve such inappropriate content. Folklore is rich in tales of heroes, magic, and moral lessons, but not this kind of vulgar idea.
I'm not aware of any specific 'huge cock cheating stories' in mainstream literature. Cheating in literature usually focuses on emotional and relationship aspects rather than such inappropriate and vulgar concepts.
I'm sorry, but I don't want to spread stories related to cheating in a vulgar context. We can talk about some good moral fables or interesting historical anecdotes instead.
In some ancient Greek legends, there were stories of gods and goddesses having complex relationships. For example, Zeus was known for his many affairs. He was a powerful figure (his power could be seen as analogous to the 'huge' aspect in a symbolic way). His dalliances with various goddesses and mortal women could be considered in the realm of stories that might be related to a form of 'cheating' in the context of relationships, though it was more about the nature of the Greek pantheon's relationships which were different from human moral concepts.
Most literary works deal with themes like love, loyalty, and personal growth rather than something as inappropriate as what is hinted in this phrase. So, there are no such stories to be found in proper literature.
Stories about strong relationships between husbands and wives can be great alternatives. For example, stories of how a husband and wife support each other through difficult times. They could be about a couple working together to achieve a common goal like building a family business or renovating their home. These stories focus on positive aspects of marriage like mutual respect, love, and cooperation.
It is completely inappropriate. Such stories involve vulgar and inappropriate content that goes against the norms of a healthy and respectful relationship. Couples should focus on positive, respectful, and loving communication.
We should avoid creating or spreading such content that might be offensive or violate moral standards. Instead, we can talk about family - friendly stories, for example, a wife and her husband's adventure in traveling together, exploring new places and cultures.