As long as he was OK with you telling others but keep in mind you tell one person then 100 or more will know eventually so increasing changes of bad reactions.
I understand the urge to tell others but think twice does this person really need to know? and you need to understand this affects you too as his partner.
If a person has a problem with it say on a religious or moral point that will bring it down on both of you and your kids so do you really want that?
Its common to want to tell others but its not always the best thing to do in the larger picture.
For instance I don't walk up to a person I meet and say hello nice to meet you I'm gay because its none of their business.
A different example I know but the same basic idea.
