How to tell MIL I’m pregnant.

So ever since my husband and I started ttc, I’ve watched hundreds of pregnancy announcements to family and big reaction videos. Always wondered how we would tell my MIL. She doesn’t like me all that much (although she’s very sweet to me in person) and never really approved of my husband and I getting married. When we announced we were engaged at a New Years family get together, she literally left the room and didn’t speak to anyone lol. Now that we are pregnant, I’m just looking for ways to tell her that she’s going to be a grandmother. Something that would make her excited for us? I’m not sure what to expect. She could be like she was with the engagement or she could be excited about it. I’m just not sure. Anyone know of some good ways to tell her?