Hello Martin, welcome to the forum.
The atmosphere evolves.
You need to watch your spacing before/after commas. No space before, one space after.
In your second sentence, you just stopped capitalizing. You need to capitalize the first word of every sentence and all proper nouns (like names of people).
Are John and Diana the parents of Christian and Carine?
At the end of what? Do you mean "in the end," like "this is how the situation ended up?"
Situations do not "appease." That is the wrong word, or you need to change the subject. One person can appease another person.
Student or Learner