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.