Trying out Outdoor Sex

This is my first story and english is not my motherlanguage (so feel free to correct me) but I hope, this story is enjoyable. (And I will maybe change the phrasing at some day).

Concept:

I want to write a story about a happy and lovely couple in which they want to try out something new. In this case, sex in public places (secretly and unseen), like the own car, a changing room in a store and etc.

New: Now they do it also in building where they are known (in the staircase of their second apartment, ...)

The sex itself:

This will not be a hardcore story. Both Partners will be equal and in one chapter the man is more in the action and in another one the woman.

Scenarios:

1. Car Sex at a parking lot
2. Sex in a changing room at a clothing store.
3. Sex on a staircase

• Others:

1. I have to think about it.
2. You can write suggestions if you want

So, with that's being said: Have fun.