Donald Trump wanted his son, Donald Trump Jr.. , to end his affair with Aubrey O'Day, a source tells Us. "Trump Sr. never reached out to her about it. He was the person who pressured Jr to stop visiting Aubrey," the source explained. "Don Jr. would tell her his dad thought it was a bad look to leave his wife for another woman. In the end, he listened to his dad." Numerous sources supported to Us that Trump Jr. Cheated on his wife, Vanessa Trump, together with O'Day at the end of 2011 until March 2012 after the pair met on the set of the year of Celebrity Apprentice. "When it began, they were quite serious all of a sudden," an O'Day insider told Us. "He told her it was over with his wife, they had been separated, and he did not love her -- all the stuff ... Aubrey fell for him hard. She believed they were going to be together for real." A source near the production of Celebrity Apprentice added, "The way he set it to Aubrey was ...