You need to build up a realistic scenario. The way the wife is reacting is not plausible. A woman who is in a good marriage will have to be seduced and coerced and that will at least take some time.
See what others have done an rewrite your story
Personally, this is not the worst story I have read on Literotica but it is obvious it has problems.
Your story demonstrates English is not your first language and this is particularly evident in these sentence, "I could not come out of my hiding, as I had no excuse for being here, doing what I was doing... We might as well wait for him here only."
Another point, your sentences seem to be about the same length, especially at the beginning, and varying the length of the sentence adds interest to the story.
Due to English not being your first language the story gets lost in the bad grammar. The advice I would give you is to work with an editor who specializes in grammar to help you find your mistakes and correct them.
