she had sex with her husband because she was frightened of him and was worried that if she didn't, he would "assume something was wrong" and suspect that she was trying to get a restraining order against him.
This is in the news because the kids now are, in fact, dead -- drowned by this woman's husband before he attempted to commit suicide.
One can call this case a tragedy, and it is, but it's also emblematic of Maryland's failure to adequately protect woman who are in dangerous and abusive relationships. Often times, abuse is difficult to combat because the victims don't seek help. This woman did, and was stymied at every turn.