My DP didn't think he was going to be able to make it to our 20 week scan so I asked my sister if she would come with me (she is also my back up birth partner if DP can't be there as he's in the forces and due to be in Afghanistan), when MIL found out my sister was coming to the scan she then said she would come too (without being invited). I wasn't to haPpy about it as she is a very over emotional person and wouldn't be the right person to offer support if it was needed if anything was found at the scan but went along with it! DP can now make the scan, my sister said straight away she wouldn't come still as it was something for my partner and me, have said to MIL that DP can now make it but she's adament she still wants to come! I'm annoyed she can't see that really it's something special for DP and I to share but she's oblivious!! It's been difficult as she was very weird about the pregnancy to start with, we have been together for over 6 years yet she insinuated I had trapped my DP into something he didn't want which really hurt! All of a sudden she now says she has "accepted" it is starting to feel happy and excited!! Part of me thinks maybe I'm being harsh not wanting her there and it is nice she is excited but part of me just feels she's gatecrashing a special time and it's dependent on her mood to how involved she wants to be!! I also think the only reason she said she would come is because my sister was coming so she thought it was her right to be there too!
Sorry for the long post/rant, just had to get it off my chest and find out if I'm being unfair!!