Did the motorist have a turn signal on or did they just start with horn honking and make you guess their intent?
If I can leave room for a motorist to make a right, I usually do. On some streets this may not be possible.
If it is otherwise tight and someone wants to make a right, they better be telling me they want to turn right before they expect me to move my vehicle. (signal intentions)
If they are just rude, (honking the horn, no signal) they wait!