Marriage and Rape

HT reports that a couple of army jawans have been arrested in Pune for gangraping a woman. At the end of that report is the following line:

The incident comes days after a married woman was gangraped in the city.

Why does that sentence need to have the word ‘married’ in it? Does the inclusion of that word change either the impact on the reader or the perceived gravity of the crime?

If so, isn’t that disturbing?