Their sex life has become boring and their opening marriage doesn't mean that their love for each other has diminished.
you are right in this
I got the point (now I have to think to awarding you in some was, lol)
They love each other but the reason is SEX PERFORMANCES!
They are looking for physical and mechanical HARD SEX..they both are addicted (and Tony is addicted to watch her when she fucks other as she is addicted to be watched)
I experienced that for some time... the pleasure and the sexual satisfation you can experience when you and your girl are in this type of relationship became addictive... (we had a contract for six months in Japan in my case)
But everything ends sooner or later....
It is sure that after six month or even 1 year there will be a point where they will be forced to confront reality (for me was when the time of night clubs contracts around the world ended)
When they run out of fun Tony and Anne will have to decide what to do...
but I hope they continue to entertain us for many more years
if this couple breaks up for us the fun will end! (and it will be a sad day)