She show her wisdom

Mother: “Son, My king, you can’t possibly know all the queenly duties, for if you did you wouldn’t be saying such things.”

Knowing that she is not ready to take your hand yet, you bring it back to your side before answering “Of course I do, I remember every lesson you taught me. Even those that went into the duties of every position of the royal family.”

Your mother looks at you with a querying look as if she is trying to exact some information from you without directly coming out and asking prompting you to asks “Are you having an issues with the queen’s highest duty”

This clearly flustered your mother as her face turns red and she clenches her fist “So you do remember.”

“Of course I remember. I am a man of my world, and I said I remember, so that means you should have no doubt that I remember.”

Your looks even more bothered by this “If you do remember, who can you be ok with demanding that I do all queenly duties.”

By now you're annoyed with beating around the bush so you walk up and whisper into her ear while placing your hand on her stomach “Because we both know that your womb is a threat to me, your king, and what is a threat to the king is a threat to his kingdom. So A fully intends to remove that threat by keeping it occupied, at least until we have finished fully securing my seat of the throne.” With everything out in the open you once again reach out your hand.