Family dynamics always are complicated, yet rarely are they played out for public consumption.

This Saturday, a week after announcing he had entered a rehab clinic in Utah, Kent Desormeaux will ride his older brother Keith’s Preakness winner, Exaggerator, in the Belmont Stakes.

Kent, a 46-year-old Hall of Famer, has failed Breathalyzer tests at Woodbine and Belmont, according to track stewards, and was fined $2,500 last October for riding “under the influence of alcohol” last July 29 at Del Mar, so the news was not surprising to Keith.

“At first I thought it might be bad timing, but then I realized there’s really never good timing for something like this,’’ Keith told Newsday on Monday afternoon as the trainer walked Exaggerator around Belmont Park’s Barn 29.

“What’s important is Kent is trying to purify his body of alcohol, which is a very good thing, and I’m very glad he’s taken that step.’’

Keith said Kent was scheduled to fly to New York last night so he can work Exaggerator 5 furlongs at 8:45 a.m. Tuesday.

advertisement | advertise on newsday

Kent Desormeaux told bloodhorse.com that a representative of the clinic “will follow me everywhere I go for 20 more days.’’

— Ed McNamara