In fact, Carolina is a wife who really cares about Dextar even though she may not be looked upon well by her husband. In fact, Dexter also understands that Carolina is a woman who really doesn't want and is willing if she isn't around Dexter herself.
For some reason Carolina was just trying to be herself. Although maybe sometimes his heart and mind didn't feel so good, but he himself was actually a little tired just because Dexter kept ignoring him, and didn't really care about him.
But indeed Carolina was just trying to be a really good wife to that Dexter, even though maybe Dexter didn't really love her that much. No matter how she tried, she just wanted to try to be a good mother to Antonio.