"My belly! and my muscles getting big with Anthony Michael!!!" Danielle captioned the pic.
The New Jersey native and the former singer met while vacationing in the Bahamas in May 2007. The pair married two years later at Oheka Castle on New York's Long Island. The couple has been starring on E! Entertainment Television's reality show Married To Jonas since August of 2012.
This would be the first child for both Danielle and Kevin.