My mum came to the first birth and that was the last... I kid you not, I could have killed her, she just ruined it and pi$$ed me off so much.. Everytime a contraction came and I was moaning, she would pace and ask the nurses to give me something to make the pain go away... I reckon your idea on telling her that it is only two people allowed is a goer. If she turns up, make sure you have informed the Midwives beforehand that you don't want her in the room. Or better still, do what I did the next time around, called her just after bubs was born..she got over it....