@cinder7 I mean, I wouldn’t fight her too hard or reason with her unless or until the doctor says it’s time to go and non-negotiable and she’s dragging her heels.
Yeah, lots of twins come early (and as a consequence are small), but neither you nor your wife know how it will go for her. Maybe she goes into labor tomorrow and she has to deliver premies, maybe she stays in good health, makes it to 38 weeks and has “normal” sized babies.
Just listen to the doctor, and don’t push her on it unless and until the doctor is saying it’s unsafe we need to get these babies out now. Then you can tell her it’s time to listen to the doctor.
For what it’s worth, I made it to 38 weeks. Mine weren’t massive (5.5lb and 6.5lbs) but we were all healthy. I would’ve been annoyed if my husband spent effort trying to “ground” me in the fact that we might not make it to 38 weeks.
On some level, she knows it’s a possibility, but why argue about something that hasn’t happened yet, that might not happen.
Just reaffirm to her that “you acknowledge and agree that the goal is to make it to 38 weeks and you aren’t delivering earlier than that unless it’s medically indicated.”
I think she just wants to know you have her back and will be her advocate.