There's no dirty dancing going on between Sean Lowe and Peta Murgatroyd.
The Dancing with the Stars pro tells PEOPLE that despite rumors, she and her partner Lowe, 29, are "just good friends like brother and sister."
The season 14 champ says gossip is to be expected given Lowe's sexy (and sometimes shirtless) routines but that it's tough for the former Bachelor star and his new fiancée, Catherine Giudici. "[The rumors are] something that [have] gotten a little out of hand with Sean and Catherine because they had just gotten engaged and it's just so crazy to think that people are making up all these stories," she says in an interview with PEOPLE. "They have to have something to talk about and it's ridiculous. There's nothing going on."
Murgatroyd has nothing but compliments for Giudici, saying, "She is such a cool girl. She's very supportive. She just wants him to do well."
Thanking Bachelor fans for voting and helping the pair continue through the competition, Murgatroyd says, "They get right behind him because they can see the type of person [who] he is. He's a lovely, lovely guy – down to earth and not a diva like all the tabloids have perceived him to be. What you see on TV with Sean is what you get in real life. He is a wholesome, beautiful human being who wouldn't hurt a fly."