Ben is Malcolm's illegitimate sonHis second name is never given in the original game. Later Word of God is that it's "Throttle" but then, it may have been his mom's maiden name. Their ages fit. Malcolm is shown to not shy away from extramarital affairs. When they first meet, they are immediately sympathetic towards each other. Bike-riding is In the Blood of all Corleys. Ben and Mo wouldn't be the first example of borderline Brother-Sister Incest that LucasArts produced (plus, one is a princess, the other is a farmboy). Lastly, the Ironic Echo when Ripburger holds the plate with "Can't Beat A Corley" in the Final Battle makes much more sense if the Corley in question is Ben rather than Mo who didn't do anything useful in the final showdown at all.
Malcolm Corley and Malcolm the Jester (from Kyrandia) are the same personSame name, and they look pretty similar. It's the only reasonable explanation.