Co-stars had sex and she thought they were a couple

Going back to that A list foreign born movie/television actor and his television female co-star.

A reason she is really ticked off at the actor is two days before the actor thrust his now wife on the world, the two co-stars had sex and she thought they were a couple.

Benedict Cumberbatch
Louise Brealey
Sherlock

Source: http://www.crazydaysandnights.net