The Spanish felt forced, like the author was trying way too hard to make them Mexican. I know sometimes they speak in that English/Spanish mix, but it didn't seem real here.
The romance seemed to develop quite rapidly. Although it is a Romeo/Juliet type story.
I respect the author for not selling out the sex scene and making it graphic. It was done very tastefully.
Overall, I was surprised I liked this as much as I did. It is a good read, but I'm not interested enough in Alex's brothers to continue the series.