Are SIL’s full of it or they have a point?

So one of my sister in law had a birthday this past weekend and they had a lil get together were her and some people met up and did Painting with a twist... cool. I wasn’t invited or anything ,no big deal. Well my husband tells me today that his sisters FaceTime him this morning and said that they wanted to invite me but since I’m due in 4 days they didn’t want to put me a risk for having the baby early.... cool. My thoughts is.... if they really wanted me there an invite would have got extended and let me make the decision to decline or not.

What are you thoughts, ladies?