Mil wanted to be at the birth, and kept telling everybody about it. She gets very ahem...emotional (understatement) when she doesn't get her way, but I thought "No way will she spoil that for me". I told her only birth partners were allowed, but being certain that she wouldn't have any of it, had her banned from the ward (secretely), and all the staff were GREAT.
Obviously didn't tell Dp the full version of things, just told him that only birth partners were allowed.
She came the following day to see the baby, and I let her, for a little while. The real nightmare started when we got back home. She turned up up to 5-6 times EVERYDAY (she lives nearby). I have found her sitting on my bed while I was asleep, and all sorts of things that would be too long to tell on here. An absolute nightmare that drove me to the edge of depression/insanity.
When DD2 was born, I was very VERY firm with her. She didn't like it, but tough. We did ask her to look after DD1 while Iwas in hospital: DD1 got a exclusive diet of chocolate digestives for 3 days. . She did leave us in peace afterwards, but kept saying in a sarcastic tone of voice : "I let you rest this time round, huh?!".
Now DC3 is due in a couple of months, I don't even plan to tell her anything until we're back home. Dp agrees that she is one funny woman (she has done lots of things to us over the years) -and not funny haha-.
Please be firm, you have your Dh on your side, which is great, and this being your first baby, it'll set the tone for the rest of your life: YOU are in charge.
Good luck.