When a virtuous father sexually connect with his son?s voyeuristic girlfriend, a sinful desire will put his beloved family and loving wife on stake, for discovering of submissive sex.

Cleaver wording and subtlety aside this logline reads a bit too cryptic for its own good.

In what way does he connect with the girlfriend? This is the inciting incident I presume if so best to describe it clearly for the reader to envisage the event.

The log line lacks a clear goal, what is it the MC wants? How is he going to achieve it?

The process of deciding whether or not to schtupp the girlfriend will only last for the first few minutes of act 2, what happens after this?

Rather similar to American Beauty would be worth while researching the structure of that script.

Hope this helps.