i know that was the same for draupadi vastraharan too but they were somewhere shaking with the fear,the fear of unknown where they don't know the future but they only know that uttara was miserable in pain
especially when arjun kept his hand on one of his brother's shoulder and turned his face in opposite direction (i don't remember though it was arjun or nakul as it was for a fraction of a second so correct me if i am wrongđ)
i feel no matter how much a man is powerful but if he is of good character then he certainly can't see any woman suffer especially in cases of this delivery and all.