As the two oldest of the Ivory family, you and Luther have the responsibility of taking care of little baby Randal...

Even when you moved away to the city you still come and visit, even though Luther is more experienced with this then you...for you Randal was a pain in the ass but still, your younger brother (still diaper changing is Luther's job)

You mostly only kept your eye on him so he wouldn't stick a fork into an outlet or something...but when it came to feeding time this was your time to shine, warming up some formula isn't that hard so Luther let you do that and if lucky also feed Randal yourself. Though only rarely.