A man cannot have two masters. But a legal matter can, at least when those two masters are co-counsel.
You've probably heard horror stories about co-counsel situations; anecdotes about overbearing, intolerable co-counsel, about attorneys who steal all the work, or lawyers who are inept, sabotaging your chance for a big payout. (We could go on.) But working with co-counsel doesn't have to be difficult, if you do it right.