Does "married adults living with parents in parents' house" count as breaching the third precept?

It's very common for unmarried adult Asians in Asia to continue to live with their parents. Some choose to move out once they're married, some people for some reasons choose to stay even after they're married. One of the object of transgression of the third precept is having intercourse with those "protected by parents". My understanding is, generally speaking, protected children are underaged children, children who are vulnerable to unwanted advances and financially dependent. In the case of a married adult couple who is already mature and independent but can't afford to buy a house therefore the adult child with his wife live with his parents in his parents' house, does this count as "protected by parents"? How should one determine the scope of "protected by parents" according to the precept?