If she's dropping the kid off at work when he's supposed to be with her that's just not right. What if you were not at work or offsite etc? Maybe time to start documenting all this with the help of your L and ask for a bigger share of the custody.
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again