Private message her this pin on Pinterest:
You had good intentions, and it may even be something your daughter in law was already considering, but really… just don’t do it. She does not need unsolicited advice about shrinking her post-partum belly from her mother in law.
I am starting to fear the moment when Pinterest notifies me that I have a new private message. I blame two parties for this: 1) the coworkers who pitched in and got my MIL an iPad as a retirement gift, and 2) Catch for teaching her how to use the Pinterest app.