Well that's a relief. He's glad that Luke already knows about them and is taking it well. He's not sure how he would take it if he met another version of himself. But he's not going to think about that possibility. Instead he just nods in approval at what Luke feels, able to sense it himself.

"It's your bond with her. You would have had it before birth. There's quite a network of Force bonds that have developed between all of us here, and you have already fit into it."