A little confused about Robert's omissions?

Why would Robert Kenzer not tell Sharon that he had a son?? Was it because he did not want Sharon to end up meeting Robert's ex-wife and hearing the bad stuff she would tell her?

If that's the case, it would almost seem like Robert, who gives the outward impression of being the "victim" (!!!) in terms of his ex-wife, knows what HE did was wrong. And that he does indeed have mental problems and control issues and does not want Sharon to find out the truth of what he really is like.

What does everyone else think?

*Gotta love those LIfetime movies. Watch this also for the handsome Gregory Harrison and beautiful Connie Sellecca.* Great guilty pleasure :)