AITA for leaving my wife when she was 7 months pregnant, because she looked fat?

Just as it sounds like. My wife was 7 months pregnant. But I noticed she was just getting more and more fat as the months went by. Whenever I asked her to get thin, she fcking said "I cannot" and blamed it on her pregnancy? Like just because you are pregnant doesn't mean you should get fat. I left my wife because of that. Not only that, she was literally blaming her problems on an innocent unborn child? This was unacceptable. So I left her.

Was I correct?