When you first add the 15 items to an array, say at Y=0, you can add the related object at Y=1. So you have Object A at 0,0 and the related object at 0,1. Object B at 1,0 and related object at 1,1. When you pick and delete the object from Y=0 you can also pick the related object at Y=1, say you are doing it in a loop which is likely, the object is at loopindex,0 and related object at loopindex,1.