I have read the novel and am kinda confuse because duke Elgy was involved with it and the translation is kinda bad because it is just a google translate (like very bad to the point that sovieshus name becomes soviet union and naviers name becomes “the butterfly” xD) but there is a possibility that it is indeed Trashtas and Soveishits child and duke Elgy just manipulated the blood test which was one of the reason why Sovieshit commited suicide(? Again the translation is very bad so am not sure if it was an accident or a suicide)
Also there is also a possibility that Navier was indeed infertile ( the recent chapter that ive read didnt state wether it was Sovieshit or Navier who is really infertile) and the magical bed where Heinley and Navier did the “deeds” is what cure her and even gave her ice magic because the bed was circulating magic to navier when they sleep on that bed
Lmaoo that sounds like a pain to even read but no the child indeed wasn’t his and there were no manipulations involved. That’s basically the plot, trashta even gave birth “early” since she was pregnant before sovieshit met her but they didnt know that that’s why they didnt know the baby actually was born on time, Also she did commit suicide bc of everything else plus idk what caused it but there was a big scar on her face so she just didnt want to live anymore.
Sovieshit is also the infertile one, both navier and him ate a cookie together when they were little and that cookie had a drug that causes infertility or miscarriage which sovieshit later on found out abt the drug but didnt tell anyone. Sovieshit didnt know which one was infertile or if both of them were infertile but when they found put that trashta was pregnant, he just assumed that navier was the only one infertile when it was the opposite
i also read the novel and i am pretty sure sovieshu didn't commit suicide. he's most likely suffering from memory loss after the paternity test inicident. duke elgy is sure to have manipulated literally too many things. i believe the kid is not sovieshu's child because they did the paternity test live in front of mant audiences and even if duke ergy manipulated the blood test, there are still witnesses that it is not true. he's just messing with them lol

YALL- so i just found out how sovieshit found out trashta’s baby isn’t his.
So apparently they did a blood test in a hall in front of other people plus the baby’s real dad showed up together with trashta’s 1st kid that she hid from sovieshit OxO