I'm almost certain that Emily is pregnant. For a while, based on some activity I saw on social media, I thought Emily and their mom might have been planning a baby shower for Sarah. But now I'm seeing that Emily's husband is following the planning process. I guess he could simply be helping out if it was for Sarah, but it'd be odd for him to be involved and not Tahlia. I know we often imagine Tahlia getting fed up with Sarah's bullshit and going no contact, but I really don't think it's going to happen if it hasn't yet. She might limit her time around Sarah or lean on other relationships more, but not helping out with a baby shower would cause a tit-ton of drama that would 100% impact her working for Sarah.
ETA: I'm not going to post screenshots or usernames because I don't want everyone flooding Em, Heather, and Will's accounts. I'll just say, it wasn't hard to stumble across their profiles on this idea curation platform. I followed Tahlia and Kurt's posts for a while on this platform because they actually posted some good design and photography inspo, but they haven't been very active so it was noticeable to me when Tahlia started a shared board with her family for another event.