While I love this story, little problems like this aside, I find it interesting that she was perfectly fine with Zach and was distrusting of the body guard that saved her daughter's life.  Same comment with the sister who distrust's the MC, given how protective she is of her little sister, you would think she would be all over the MC in a positive way (could have been an opportunity for a better relationship between the two).  I love this story, but I can see better ways to write some of it and still have moments that draw characters closer while maintaining the drama and everything that makes this a good story.
Charlotte's trust is misplaced, as well as the older sister.  I just hope the dev sees the flaws in this and corrects it.  The older sister I can handle, although not hearing anyone about what happened makes zero sense.  But Charlotte carrying on as if the MC is some sort of danger just insulted my intelligence to no end.