Wow it just keeps going...... Long

This is going to be long and some rambling so I apologize now.
For the last 3 weeks Dh has been working 18 hrs a day on the farm. It has been me alone with the kids and my high risk pregnancy doesn't allow for much. I think most of you have seen my FB status lately and I'm usually whining but again most of you know what it's like to be exhausted and still have to deal with the kiddos.
Well tonight I made a status about my kids climbing on me every time I sit down and apparently my friends husband found it as a chance to tell me how he really feels about my parenting skills. What's worse is his wife ( who is suppose to be my best friend) backed him in an email basically telling me I'm a crappy mom that allows her children to get away with everything. That it's mine and dhs fault they behave the way they do. Now I am mad and want to tell her how I really feel because she doesn't know anything about being a mom or raising kids because she doesn't have any but the nice person in me doesn't want to hurt her feelings because I know they have been trying for 2 years. Now maybe I see why they haven't had any yet and it's because they have unrealistic ideas on how children should behave. For now I am done talking to them. I really had hoped it would come to this because outside of kids we get along great.