I mean I understand they don't want him to stress but at this point they're babying him. (And ik he is the baby of the family) but we've all seen how capable and strong willed jeong yeon is. You can see that in the way he worries and takes care of his mom or the time when he went on the trip with his sister, he practically did everything and even got them out of trouble. He's a grown man, an adult. It's just weird to me how they're keeping him in the blind like this. They could've gently discussed it with him and im sure jeong yeon would've wanted to be in on the loop with what's going on