Credit: Jason LaVeris/

Vienna Girardi claims she wasn't worried about fiance Jake Pavelka dancing a sexy tango with Chelsie Hightower on Monday's Dancing With the Stars (the two earned a 38).

"I knew the tango was going to be a sexy dance, so I made sure to say, 'Baby, you've got to be sexy! Get into Chelsie!'" she told Monday at "An Evening With Mark Ballas" in L.A. "I was watching the dance, and he was doing his hand things and being all sexy, and I was like, 'Yes, that's what you have to do!'"

Added Pavelka, 32: "She’s like, 'Don't worry about me! I'm secure.'"

Girardi, 23, added that Hightower, 20, is "like a little sister to us. I adore her. We went to Disneyworld together. She comes to dinner with our families."

Pavelka told Us DWTS has made his relationship with Girardi "stronger."

"She makes my 1,200-calorie shake every morning," he said. She added that she takes him "to practice and I bring him lunch. I give him ice packs for his feet at night."

Despite being engaged for six months, he said, "We don’t have any [wedding] plans yet. We don't know where, but we are starting to talk about this and that."

Said Girardi, "We are talking about 2011 and where we want it."

Will it be televised?

"Who knows?” said Pavelka.

As for kids? "Of course!” Pavelka said.

“Absolutely!" added Girardi, who just landed a gig as an Extra correspondent. "I want three!"