Who is the donor?

When the ceremony ended with joyful laughter and applause after many difficulties, Dan Heng stood frozen in place, silent, but with hatred for something that was not his choice at all. "Funny, as expected... Don't disappoint me with unnecessary actions. We're only in this marriage for your parents." He snorted, muttering quietly in irritation, looking away to control the anger slowly building in his voice. The sooner you find out about this, the colder it becomes between...