Perhaps it's about the girl introducing her new boyfriend to her friends and family, which is a crucial part of 'breaking in' a new partner into her life. It might involve some nervousness on both parts and how they handle social situations together.
In the'mistress breaking her new pet story', the main characters are, of course, the mistress and her new pet. The mistress could be a wealthy lady who has always had pets but has a short temper. The new pet could be a small bird that she got on a whim. Additionally, there could be a vet who becomes involved later when the pet's health starts to decline due to the mistress's actions. The vet could try to educate the mistress on proper pet care.
The plot could be that the mistress, perhaps in a fit of anger or disappointment, mistreats her new pet. Maybe the pet fails to follow a command, and she scolds it harshly or even physically punishes it. It could also be that she neglects the pet's basic needs like food or water, leading to a 'breaking' of the relationship between them.
Well, building a relationship with the new man involves trust. She needs to trust him and also be trustworthy herself. Trust is like the foundation of a building. Without it, the relationship will be shaky. Another aspect is patience. Everyone has their own pace in a relationship. If he's not ready to take a certain step, she should be patient. And they should support each other in their personal growth.
I don't really know who the man is in this story. He could be a fictional character created to illustrate a point. For example, he could be a character in a moral story, representing perseverance. He might be someone who has been given a difficult task of breaking the stone as a test of his strength or determination.
It's not likely that 'new life sex story' is a popular concept. Usually, concepts that are popular in the realm of sex and relationships are more broad - like healthy relationships, sexual health, etc. 'New life sex story' seems rather specific and not something that has gained widespread popularity.
I'm not sure specifically what this 'new life sex story' is about as the term is rather ambiguous. It could potentially be a fictional account related to new experiences in a sexual context within a new phase of life, but without more information it's hard to say.
No, it's not ethical. Spying invades privacy, even in a situation of suspected cheating. There are more appropriate ways to deal with relationship issues, such as honest communication or seeking professional help.