Anyone have any wild card family members?

Hoping you ladies can share some of your announcement experiences. I am just 2 weeks from announcing to my family and starting to get really worried.

I am pretty concerned with how my sister is going to take the news, since I've been married she tends to slip in the fact i shouldn't be having children anytime soon into our every conversation. Very blatantly obvious when she does, she is currently waiting for her bf to propose but he's having financial issues so he still lives with his parents and she lives with our parents so it's not soon enough.

Since my wedding she is very clear that I should wait awhile on babies and even tells family members and friends that we're waiting 10 years. And no I've never said that to her I always just brushed her off and say someday we will. Anyways after my wedding 2 years ago she said i have to wait until after she has a baby to get pregnant cause I'm younger.

Not for a second did I ever take that seriously I mean that's a decision for me and my husband not her. Even with this issue our relationship has improved alot over the years. So now im just getting worried once we announce idk what her reaction will be.

Anyone have advice or experience with a wildcard relative? I know it shouldn't bug me about her reaction since we're so excited but she has a checkered past of reactions to this kind of thing.😒