It's like all the other girls who have "excess" births beyond their cap. The 1st 6 or 10 (depends on the girl) are named sprites that appear on the map. The rest after that just disappear, she will say I'm preg, she will go through pregnancy, she will announce birth. She will be holding the baby like any other announment but their is no naming & the game moves on like nothing happened.
Like with Liandra, Luthien, Geynnety, Jenny ect..
Unpopular opinion: I'm ok with this being the go to. I like the cap for named kids cos I like to see the home & beds get filled up & I would rather the game keep pregnancy while never addressing these new births because. I just like the cap lol