Weeelllllll, here's my take on it: Your body, your decision. Now, I would honor his request not to tell up to a certain point, but past the point of being reasonable? Uh, no. His family is his problem, so you don't have to tell them, but he has absolutely no right to expect you not to tell anyone at all. I'd give him until 13 or 14 weeks because that is totally reasonable. After that, you tell whoever you want, except his family, which is his business. If they find out from someone else because he was too bull-headed to tell them, let him deal with it.
I guess it's all in how you view your relationship. I figure my partner and I are working together, and we do our best to honor each other's wishes. However, if one of us goes completely bonkers and asks for something unreasonable, then the other one does not have to do it. We don't take orders from each other. And most especially not when it comes to what's going on with MY body and who I can tell about it.
Edited by Plummeting - 10/18/11 at 1:22am