The husband of actress Zsa Zsa Gabor said Friday that he had a decade-long affair with Anna Nicole Smith and may be her infant daughter’s father.

The claim by Prince Frederick von Anhalt comes amid a paternity suit over Smith’s 5-month-old daughter, Dannielynn. The birth certificate lists Dannielynn’s father as attorney Howard K. Stern, but former Smith boyfriend Larry Birkhead is waging a legal challenge, saying he is the father.

“If you go back from September, she wasn’t with one of those ...