The most immediate consequence would be the destruction of your relationship with your girlfriend. She would likely feel extremely betrayed and angry. It could also lead to a rift within the family, causing a great deal of emotional pain for all involved.
Definitely not. In most cultures and societies, there are clear boundaries within relationships. Having sexual relations with your girlfriend's mother is not only morally wrong but can also cause irreparable damage to many relationships, including the relationship with your girlfriend, her family, and your own self - respect.
Oh, that's an awkward situation. Maybe it was a case of someone waking up confused in the wrong bed and realizing it was their mom instead of their girlfriend. It could have been a situation where in the dark or in a sleepy daze, the person made a wrong assumption about the person in the bed. For example, if they were visiting their parents' place and had a late night, and their old habits of being at home made them end up in the wrong room.
Sharing such personal and private stories is inappropriate and disrespectful to the ex - girlfriend. Everyone's relationships should be treated with respect and privacy.
No, it is completely unethical. Being involved in any sexual relationship with a friend's girlfriend violates the basic principles of friendship and loyalty. It can cause great harm to your friend and lead to the breakdown of the friendship.
One possible plot could be that the mom really likes a girl she knows, like a daughter of a friend. She then tries to set up her son with this girl. She might arrange a lot of 'accidental' meetings, or constantly talk about the girl's good qualities to her son until finally, the son starts to consider the girl as a potential girlfriend.
It can end well if the son and the girl actually start to like each other for real. Maybe at first they were reluctant because of the mom's forcing, but as they spend more time together, they discover they have a lot in common and fall in love.
Well, once my ex - gf's mom was really strict. She always had a lot of rules for my ex - gf. For example, she had a curfew for her even when she was in college. It often led to some arguments between my ex - gf and her mom.
In general, such a plot is a very controversial and often unacceptable one in most ethical and moral frameworks. It involves inappropriate relationships that go against family values and social norms. However, in the realm of extremely edgy or shock - value - seeking fictional works, it might be explored, but it still raises many eyebrows and can be considered distasteful.