Congratulations - that is wonderful news!!!

I think it is so lovely for you to have them so close together. My DD1 and DS are a little over 12 months apart and I love how close they are in age and friendship.

I can understand that you are worried about your sister - the only thing that I can suggest is that you tell her in private before you tell anyone else so she has a heads up. Don't expect anything from her and let her just react the way that she wants to. It is lovely of you to think of her.

Enjoy your pregnancy and planning for your next bub!