The Saturdays singer told Heat that Horan frequently visits the house she shares with her husband and JLS star Marvin Humes.
"Niall lives close to us, so we make him dinner," she said.
"He talks to us about girls and stuff and I give my input and say, 'You can't go out with her!'"
She added: "Any of Niall's girls has to be Rochelle-approved. I'm sure he's a little sod and not innocent, but I like to think he is."
Last year, Horan said that he had not had a girlfriend since he was 13 and that he was waiting for the "right girl" to come along.
Horan's father Bobby said in May that his son "never really brought girls home" but added that he is probably not a virgin and also claimed that he loves a "local girl".
He has since been linked to singer and X Factor USA judge Demi Lovato, though both have denied the reports.
X Factor boss Simon Cowell recently teased Lovato on TV about the alleged fling.
Wiseman added of Horan's trips to her home: "When 1D first started, they were younger than Marv and looked up at him.
"They weren't from London, so Marv showed them the ropes. They come over to ours a lot.
"I remember one time Harry [Styles] fell asleep in my dog's bed... in there on his own, having a nap in the dog's bed, all curled up."