romantic ben parsons , 34 , of brighton , east sussex , stunned girlfriend anna jefferson , 36 , by getting down on one knee after running 24 and a half miles .
she was watching her boyfriend run in the brighton marathon with their children nancy , three , and thomas , 11 months .
ben parson , 34 , paused in the middle of the brighton marathon and proposed to his girlfriend , anna jefferson , 36 .
anna feared her boyfriend was struggling when he stopped to propose to girlfriend and mother of his two children , anna parsons .