She might be trying to be 'cool' or relatable in a wrong way. Sometimes parents misjudge what is acceptable to share with their children in an attempt to seem more modern or approachable.
The mom should firmly but gently tell the son that such stories are not appropriate for them to discuss. She can say something like 'Those are not the kind of stories we talk about in our family.'
The son should firmly but politely let his mom know that such topics are inappropriate. For example, he could say 'Mom, these stories make me uncomfortable. Let's not talk about this.'
Adventure stories are also great alternatives. Imagine climbing a high mountain and facing various challenges along the way, like bad weather and difficult terrains. These stories can be exciting and inspiring.
Recovery depends on both parties' willingness. The wife needs to be completely honest about what led to the incident. Then, the couple should focus on rebuilding the emotional connection. They can start by doing simple things like having dinner together every night and sharing their daily experiences. Also, the husband has to be open to forgiving, though it won't be easy.
This is completely unacceptable to discuss. Family is a place of love, care and positive nurturing. Topics like this go against the very essence of a healthy family environment and are not suitable for any form of discussion.
This kind of topic is highly disturbing and goes against social and moral norms. We should avoid any such discussions or thoughts that are harmful and improper.
I heard about a situation where a new couple was exploring their sexuality. They thought that the 'withdrawal method' was safe enough. But as it often does, it failed, and the woman became pregnant. This led to a great deal of soul - searching and discussions about their future and the future of the unborn child.
The best thing to do is to pretend you didn't hear it. It's a private matter and you should respect her privacy. Just keep it to yourself and try not to think about it too much.