No. She has had multiple pregnancies but it has led to only miscarriages or stillborn children.
What she desires is not even to be a "mother" but the birth of a "pure-blood" heir even if it is not by her.
That is why the King marrying Berta and Luis being the heir disgusts her not out of jealousy more anger that a "mixed blood" child will inherit the throne and "taint" their bloodline. She is a pure-blood supremacist.
The problem why she and the king can't have healthy children. Or why the fertility rate among the high-class nobles of their community is so low is due to continual inbreeding. Has made the chances of conception of healthy children very low.
The king had countless "pure-blood" concubines (encouraged and selected by the 1st queen) supplied to him over the years, yet none of them could produce an heir with him. Yet he sleeps with a "dirty blood" petrian Provencal girl a couple of times and it produces a mixed yet healthy child that will now be the heir.
This is what angers her. And why she wants "custody" of the child. Her motives are sinister and even Johanna knows this.
The king is the only one in denial.
THANKS FOR INFORMATION BUT 1ST QUEEN BEING SUCH SUPREMIST MEANS SHE DOES CONTAIN A LOT OF EVIL THOUGHTS WITHIN HERSELF...
she is mentally unstable.
That means we r right in both the versions
The first queen actually can get pregnant but she does not want to have burden for carrying one in her womb(๑•ㅂ•)و✧