How to handle the ex's new wife...?

Ok, my ex got remarried, they are in Oklahoma, Im in TN, with our only child. Now once they got married I was bombarded with emails from her... about my son.. In an email she stted, "If you want me to back off , let me know." So I responded, yes that I did want her to back off, until I get use to everything.....Well she got upset went to my ex and complained, and wrote a blog. She sent clothes for him, and i mean the outfits was about 100 each. I said thankyou, and that next time, its Matt's turn to by clothes for his son, please make sure there are "play clothes" cause a 3 year old at school,...yeah... So she throws it in my face tht she was the one picking them out and they were all "name brand"..... I don't know its a lot of stupid stuff, now its in my myspace, she doing this childish battle..... What the heck do I do? What are some ideas ...of how to respond to this? I never been threw this before.....