09/13/2012 at 06:00 AM EDT
Kevin and Danielle Jonas
got their fill of fashion at the Badgley Mischka show at Lincoln Center in New York City on Tuesday.
The Married to Jonas
stars, who sat front row
, took Danielle's younger sister, Katie, along to experience Fashion Week for the first time.
Then the trio headed over to The Daily Style Sessions where the girls stocked up on Chantelle Lingerie and Kevin snacked on Strawberry Fields Tic Tacs.
Kevin was overheard saying he and Danielle took it easy Monday night, while his brothers Joe and Nick
went out to the Marc Jacobs after-party
, an onlooker tells PEOPLE.
"He also mentioned how busy he and Danielle have been while filming their reality show," the source adds. "But he's excited about how it turned out."
, Gossip Girl
's Michelle Trachtenberg
, musician Alexa Ray Joel and Olympians Aly Raisman
and Allyson Felix
were also at the show.
– Carlos Greer