Oh Calpurnia! I'm so sorry he's making you feel that way!! No one wants to feel bad for being the shape they are during pregnancy, people are supposed to celebrate you and tell you how beautiful you are! I can't believe he's not supportive. Perhaps he just doesn't know how to process the fact that you're pregnant (Like who doesn't understand that women get big when they're pregnant??). I'm glad you've realized how important it is to release yourself from that negativity. I'd distance yourself for a bit (if you can). If anyone in my family made me feel that bad, even my mom, I'd restrict my time with them (and I have in the past).
My yoga teacher told us all that we need to be forgiving of our bodies during this time. They may not be able to run or bend or do what they once could, but they're creating life inside! That's a monumental task! That totally trumps being able to do x number of sit-ups in my book, or ride a bike x number of miles a day. You are a mama! And that's one thing he'll never be able to do!