Brian McGurk went to court after discovering a blog that showed his 43-year-old ex-wife dancing at a gallery.
In other Internet postings, she wrote about dancing vigorously for several hours every day.
Dorothy McGurk told the court that the dancing was physical therapy for injuries she suffered in a car accident in the mid-1990s.
A county judge didn't buy it - and reduced her payments to $400 per month.
The judge also ordered her to pay her ex-husband's legal fees and 60 percent from the sale of their home.
