I'd be cautious about this one. Sounds way too juicy to not have more sauce. Articles say she had a child a couple of years ago, unmarried at the time. Have not found anything to support this claim of marriage. And when it's tied into the Seth Rich claim, could be bait to discredit.
https://www.nbcwashington.com/news/local/dc-mayor-muriel-bowser-to-introduce-baby-miranda-on-today-show/54521/