IMO Chelsea isn't the only one lying. I believe Dylan knows the baby isn't his. ;)
Quote ping123: Dylan's struggles with PTSD will show a different side of him.
I hope he is mean to Chelsea, like she is to him. She needs to stop lying.
I believe that Dylan knows as well, but wants so badly to be a father that he's going along with the lie, without telling Chelsea. I mean, listen at some of his comments, like when he was talking to the baby and said "I want you to be a better man than your Father" I don't think that he meant himself, but rather was talking about Adam. Another point is when, in the previews, he snaps at Adam "stay away from my wife and my son!" I think, in his mind, that he's created the family that he's always wanted, and is afraid that Adam can/will take it all away from him.