The word got out that Ghoto and Mihila had been summoned for questioning. It indicated that the upper echelon of the family have been drawn towards the issue of the pregnancy and they had deemed it important to call for an inquisition. This caused a peak in curiosity about the pregnancy and many people wanted to know the result of the summoning.
In a family like the Ghastorix's, even those with the weakest bloodline will eventually become transcendents if they work hard. So the family doesn't consider the transcendent level as overly significant considering their long history.
The Ghastorix family is just a middle-class family that has been established for over ten thousand origin cycles, it is a short history when compared to the large families. A transcendent can only live up to a maximum of an origin cycle, so their significance can be relatively overlooked because of their history.
