You know normally I don't think the breakup of long-term relationships (married or no) is a terrible thing that must be remedied, but I see things like this thread too often, and it makes me take pause. On the Nest:
S/O Why do women marry men like this...
I am not defending her husband but I would have a problem if my husband changed his appearance drastically or refused to have sex. Gaining weight and refusing to be active would be a problem because his appearance, sex, and doing active things with him is part of our bond. I think making major changes to your body is just as hurtful to a relationship as making major changes to your personality.
If you are married you vowed to stay and love regardless of ups and downs, but realistically, I want my husband to still be the man I married. Now, presumably they had a discussion about having a baby before she got pregnant, so he knew pregnancy would change her body. He may be just encouraging her to be healthy so she has a safe pregnancy. As long as you arent being a douche about it, asking your partner to not let themselves go is not an unreasonable request in my opinion.
Do you think the commonly less-than-a-lifetime shelf life of love has something to do with this notion, that despite age and life and time inevitably changing everyone, they're required to stay exactly the same for love to survive? Do you think that maybe the frantic need to make something that is by nature transient (who you and others are at this moment) into something permanent stifles both people in a marriage so that they can't grow, and they both resent each other for that stifling and are unwilling to constantly get to know a "new" spouse so that the love just dies? Am I making sense?