Thats not his daughter!
Thats Dorys Madden! He is actually dating that woman!
I had no clue who Dorys Madden was before this post, but a quick Google search and...you're right. And apparently they've had three kids together, one when he was still married. According to his Wikipedia page, he had a couple of kids with women he wasn't married to while he was still married.
In 1979, Erving began an adulterous affair with sportswriter Samantha Stevenson, resulting in the 1980 birth of American tennis player Alexandra Stevenson. Although Erving's fatherhood of Alexandra Stevenson was known privately to the families involved, it did not become public knowledge until Stevenson reached the semifinals at Wimbledon in 1999
In 2003, Erving fathered a second child outside of his marriage, this time with a woman named Dorýs Madden. Julius and Turquoise Erving were subsequently divorced. Julius Erving continued his relationship with Madden, with the couple having two more children together. In 2008, Erving and Madden were married