dabling

Hi, I need advice please. My fiancé only wants to have 2 kids. But, I would like to have 4. But I'm willing to compromise to having 3. I told her that I can compromise to having 3 kids, but no way I'm just having 2. She doesn't want to budge on having just 2 kids. My question now is, should I end the relationship because of this? I don't know what to do.