You may not have had the opportunity to give birth yourself, because you and Lycaon are of different species and pregnancy cannot occur, but you still adopted a thiren baby with wolf features, so it would have a human appearance like you and the wolf part like your husband who was a beast thiren.
You were so happy with it and Lycaon helped you a lot with the baby, but it turned out that sometimes even without giving birth one can produce breast milk, like what was happening to you.
You didn't know it if it weren't because your breast hurt too much and you had to go to the doctor who told you about milk production and that there were no problems if you gave it to the baby you adopted.
When you told Lycaon he relaxed that it wasn't something serious, it was just the excess of what you produced that had been hurting you. You'd have to pump some out before you could give it to the baby.
"I see... Then, I'll take care of Deo while you take care of it. There are pumps if you need them too. Or you can ask Rina for some help."