I feel that something like that might happen in the future.
I wonder if this is all the reason his wife married him and had a baby with him in the first place...
I mean she did say in chap 13 that yeonjin needs to avenge her muse... so my guess is that she is ALL IN in this plan of his so i don't think his own son will find about this..i mean the wife knows all and she is caring for him so I don't think it will happen....i don't even think they live together at all as a family, its like he stays in a different apartment most of the time since i have never ever seen them together s a family when moonhyuk is there aside from that 1 party ┑(￣Д ￣)┍
Hopefully the son doesn't see what happens behind closed doors, as much as I love Yeonjin I don't want him to traumatize his kid lol.
SORRY MY DEAR UKE but you're no different than your father think about it you also have a son what if your son saw you fucking some dude what will he felt that can even bring him trauma as it did to you IDK IDK