Baby on the Way for Jason and Molly Mesnick

It’s a Bachelor baby!

Jason and Molly Malaney Mesnick are expecting their first child together in late March, the couple tell PEOPLE exclusively.

“Our family is getting a little bit bigger!” Molly, 28, proudly declares. “I’m into my second trimester and I feel really good.”

The couple met on season 13 of the ABC reality dating show and endured intense media scrutiny over their union. But the criticism died down after the two settled down in Seattle and got engaged.

The new addition will join Ty, Jason’s 7-year-old son from his first marriage.

“He’s been so excited to be a big brother,” Jason says, explaining that the couple — who wed in February 2010 — decided...