I don't think the 'couple' are married. Or they could have done the scene in their home 'entirely for both of them', why choose the restaurant, a public place? Yes, anywhere else in the world the scene is just normal, not only you can see like this in restaurants but, inside the trains,the lifts, hallway stations. But in Qatar, one should respect the country's culture, as some people are not ready to see such display of affection in public.

"I do live by the motto that pessimists are usually right, but all the great change in history was done by optimists" -Thomas Friedman