Secrets are part of what binds spousal victims to abusers. When you break the secret silence you take a giant step out into the light and freedom. It's hard to do, because no one wants everyone to know they've made a bad choice in a mate. They don't want pity or scorn. But breaking the silence often has to be done to get free.
Victims feel they have been living a lie by staying with the abuser, that people will think they are liars for letting everyone believe it was all right when it wasn't. But, it is not your responsibility to tell people what has been happening until you are ready and if you need to. Those who understand will praise and support you in telling.