Publicist Max Clifford has taken over dealing with Alfie Patten's media relations since baby Maisie was born to girlfriend Chantelle Steadman, 15.
Clifford told Sky News Online: "There will be a DNA test, I think so."
The family has dominated headlines since the news first emerged at the end of last week.
But over the weekend, more young teenage boys came forward, claiming they could be baby Maisie's father.
Alfie, from East Sussex, has already pledged to be a "good dad... and care for it". The claims he might not be Maisie's biological father seem to have made the teenager more determined to prove his case.
He told The Sun that if he has a DNA test, it will confirm what he already knows and then the other boys "can all shut up".
And Chantelle has insisted to The Sun: "There has been no one else."
She told the newspaper she loves Alfie and has never slept with another boy.
Alfie, a young-looking 13-year-old, is not facing any charges over his underaged sexual relationship with Chantelle. Instead, police and social workers have said they will support the family as it grows.
Children's Secretary Ed Balls told Sky News on Friday the situation involving the two teenagers was "awful".
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