Fiction by Denise Grover Swank.
This was a fun mystery/romance about a repressed girl who loses her inhibitions with alarming rapidity after her domineering mother is killed. Of course she is suspect number one in her mother's murder.
It was a cute book, but the plot suffered from a little from a fictional device that annoys me, which I call I-Can't-Tell-The-Truth-or-The-Story-Will-End-Here-Syndrome. This shows up in romances quite a bit, in which a main character withholds some vital piece of information form his/her love interest for flimsy reasons, making it obvious that the author is using the device to further complicate the plot and lengthen the story.
Still, this was a pretty good novel.