If agree with @carojo, never a good idea to air dirty laundry worldwide!
the article is very biased as we're not told what Heidi had/hadn't done to provoke such an email - the mother-in-law-to-be seems to be vilified out of proportion! Not all in-laws are the devils spawn
(and no, I'm not an in-law!!)
I think this calls for better communication between the 2 women & also Heidi setting HER expectations more realistically (based on what's been written, which I've already noted is biased so this might not even be necessary !!)