let your friend breath.... at least for once avoid thinking of her husband, tell your friend to find time for herself to go to the gym, it might help her loose weight, and sometimes thinking too much will cause her to look a bit old, just tell her to be a happy woman, and having a child should be her inspiration.

Too much depress tends you to become looking old.

Good idea that your friend is working to get back in shape, my advise is that, use it as a motivator for herself, and her child is the main reason to get her back in shape.