A man claiming to be the father of Nadya Suleman’s octuplets will appear in an interview set to air on ABC’s Good Morning America on Monday.

There’s only one little problem–a rep for the mother of fourteen says the man is not the sperm donor!

The unidentified man is alleging that Nadya, 33, had him donate sperm to the clinic where she received in vitro fertilization.

“The real sperm donor knows who he is. This guy is definitely not the one,” Nadya’s rep told PEOPLE on Wednesday. “It’s kind of comical. Nadya’s not sure why he’s doing this.”

“That’s definitely not him,” Nadya told Radar Online on Saturday. “I know who the father is.”