Of course it will. He's BDSM-sis' pain-piggy. He needs to be fat and dumb and jolly so she can enjoy stepping on his nuts or whatever she gets off on. But most dommes will also switch. Bet he'll be a hyper-confident powerful badass or somethin', whatever gets HER submissive motor running.
Most of the dommes I've met, and a good few fellow doms, have all been switches. Highly dependent on openly switching, or as a guilty little pleasure. Of course, a character will always turn out to be whatever is wished by the author. But I wouldn't put it past her.