What did Rasheed do when Laila told him that she made Mariam leave with her?

Rasheed punches Laila when she told him to blame her for Mariam's leaving.

Laila didn't see the punch coming. One moment she was talking and the next she was on all fours, wide-eyed and red-faced, trying to draw a breath. It was as if a car had hit her at full speed, in the tender place between the lower tip of the breastbone and the belly button.