"People are like, 'All right guys, what's your plan? When are you going to have those grandkids?' " says Kevin, 24, in a clip from Married to Jonas, which premieres August 19 on E!. "I'm starting to feel that pressure a little bit."
Adds Danielle, 26: "My mom wants a grandkid bad. It's getting boring now."
The couple's reality show will follow Kevin and Danielle as they balance their relationship with Kevin's musical career.
After meeting on a family vacation to the Bahamas in 2007, Kevin and Danielle tied the knot in a lavish ceremony in December 2009.