I had been putting it off as I knew what it would be like. I am 40, we have 2 lovely boys of 8 and 3, and I am expecting another in April. Me and dp are solvent, in good health etc, no reason why we should not choose to have another child.
I rang my (narcissistic) mother today to tell her, and she just said "Oh my God. Oh my God. Oh my God. Oh my God. Oh my God." for about 2 minutes. At this point I thought she had had enough time to be an arse, and said "this is the bit where you say 'congratulations'." Cue another 2 mins of "Oh my God. Well I was not expecting you to say that. Oh my God. You have knocked the wind out of my sails. Oh my God. Oh my God. Oh my God."
Other gems I saw coming a mile off: "Where will you put it?" (we currently co-sleep with ds2, but we have a good-sized bedroom with 2 big futons), "So you've have to stop feeding ds2" (er, no, why?). I wasn't expecting "You will have to move house" (we've got a smallish house but it has 3 bedrooms) or "Do you think you will get really fat again?" (yes probably, who cares ffs?)
Afterwards I felt it was exactly as I expected - dp can't imagine why she reacted like this, but it's because it's not what she personally would have chosen for us to do (fuck knows why, she had 3 children herself), and anyone making choices different to what she would have chosen, is not to be tolerated - she takes it as a complete shock and a personal insult. I know she will stew on it and find some other charming things to say, to show her displeasure.
I am just going over it really, I know there is nothing anyone can say to fix it, but some sympathy or support would be appreciated...