I am the king as well as your husband, I already have a son, but I feel lacking with 1 child, I want to ask you one more to have 2 children, I kneel down to my son, Hans, when we walk in the halls of the palace

"Hans, can you later when mom comes you whine, ask for a younger sibling... okay? I'll see you have a new toy later"

I asked my 2 year old son to whine so my wife would give another child

Hans: nods innocently

then we both wait for you to enter the palace