I read a few books from this series a few years ago and never wrote it down!  They were so good tho!

Here's what I remember:

The books are about a set of 3 brothers, one of the brothers names is Davey.  They are all 3 really strong, manly, and work at a dojo doing tai kwon do or karate or something like that.  One of the books features Davey and this woman who randomly walks into his life.  This woman makes deadly jewelry.  Her hair clips, you press a button and out pops a blade.  Her necklaces hold poison in them.  She makes all sorts of cool deadly jewelry.  Davey and this woman meet and he has to tail her and stay by her side because she is wanted by an old man who "loves" her and this old man has taken Davey's mentor and is holding him captive.  Davey must seduce this woman every day and videotape it in order for this old man to keep Davey's mentor alive.  In the end Davey falls in love with this woman and tries to save her from the old man.

I don't remember much else.  I didn't read the whole series and I had always meant to go back and get the other books, but now I don't remember the title!  Anyone know?!  I may have found the books in the library's thriller/fantasy section.  Not sure though.

Christina, it doesn't sound familiar to me, but if no one here can help, try over at www.abebooks.com.  They have a forum called Booksleuth and with this amount of info someone over there should be able to help you. They are amazing when it comes to helping find an author/title of a book!

 Are they like a thriller/romance?  I did a quick look on amazon and the McCloud Brothers Series by Shannon McKenna popped up.  

The plot of the third book seemed a little like what you described - but I haven't read it so I am not sure.  Good Luck!

The first think I thought of was The Mccloud series by Shannon McKenna.  The hereoine of Ultimate Weapon makes the weapon jewelry.  She's in several of hte books but Ultimate Weapon is her starring book.  Davy McCloud is the hero of Out of Control and there's a gym in there. 

OMG!  Thats it!!!  You guys are so great!!!!  Thank you so MUCH!

Ha I just had some charachters mixed up!