Ive only read the description but I swear this is the novel One Child Two Treasures The Billionaire Chief is Good Wife...#－.－)
Wait nvm in that novel she was a surrogate mother and had twins but one seemed to have died but didn't so she didn't tell and just raised him...
I thought the storyline was more similar to Hidden marriage doe.
I hate Leon...he's so nosy and forceful and every line of dialogue is "I'm taking you to the station" "is that illegal in arresting you" (even if it isn't illegal) "you seem suspicious I'm arresting you"...he does that carp 24/7 and every time there's no fucking evidence just him always wanting to arrest Count D for stupid shit...and even after finding out the shops secret he always seems to forget Count D has rules on the pets and if they aren't followed the customer will most likely end up dead..but nope in Leons mind after seeing this shut a hundred times he still goes crazy and threatens D... Like he's so damn annoying..in my opinion the manga would be 1000 times better if he was cut out..though I already love the manga I just can't stand seeing his fucking face