In their college years, Harry studied to be a social worker while Dudley studied to be a lawyer. Vernon was glad he started another trust fund for Harry. He didn't want to take anything out of Dudley's so he started filling Harry's up until it was even. Then gave each boy a percentage of his income. He was silently grateful Harry didn't choose a magical career. He didn't want this Voldermort fellow hurting Harry, though he was told by Dumbledore the man never came back.
Harry adopted three children with his husband. While Dudley finally found a wife who accepted Harry for who he was, magic, gayness, and all. Vernon wasn't expecting a phone call from a frantic wife 5 years later, "My daughter floated a bottle to herself. What do I do?" While Dudley was at work. "What if her sisters and brother get jealous?" "Calm down, here's my advice, treat them equally and explain to the older children that Violet doing magic is not bad or good. And get used to the good and bad magic can bring. High emotions usually are what cause accidental magic. Your daughter was just hungry." Dudley was grateful his dad gave his wife advice and called to thank him, after he and his wife discussed the situation.