My kids are so nonchalant about me being pregnant, I don't think they'll take any notice of the scans. And yes, they'll be coming.
I went to 2 midwife appointments WITH them and they still had no idea I was pregnant, they are so wrapped up in themselves! I only just told them the other day. Thomas just said something like "what will I name it? How about Bluey" and Sophie lifted my shirt up to see the baby and was confused when it wasn't there. They haven't mentioned it since.
The only scan they don't want children here for is a dating scan, for some reason. Scanning places here are not hospitals though, they are their own separate business/building and are quite nice really, there are no doctors and the staff are always kind.