Please fire me. I’ve just been told that the reason I haven’t been made partner yet is because...

Please fire me. I’ve just been told that the reason I haven’t been made partner yet is because they’ve been “expecting me to go on maternity leave any day now” for four years. Yes, when I took the position I made it clear I wasn’t going to have children, but you see, the men figured I was “supposed to have changed my mind by now.”