Malleus is your husband, being the prince of his own kingdom means that he would probably need an heir...

And since male dragons cannot lay eggs (obviously) he's been trying to work up the courage to ask you for an heir

He's been taking notes on how to ask for a baby, how to take care of your pregnant spouse from lilia

Of course he won't force you to do it, being pregnant and going through labor is a scary thing and he's very grateful he's a man because of it.