To answer your question: NO. The books aren’t a series and don’t NEED to be read in any certain order, other than Tempted, which should be read before Naked. (Even the Order of Solace books don’t need to be read in any certain order.)
However, if you really, really want a reading order, there's a nice one started here.
But really, the books are standalone and meant to be read in whatever order tickles your fancy. Characters reappear in different books, so the link above will help, but don’t hold it as the standard. Read at your pleasure!
And thank you!