Oteri announced she's pregnant with her second child in July, which was less than four months after marrying her longtime love Bracy Maynard. This is Oteri's first child with Maynard although she has a nine-year-old son Ben from her previous marriage.
On Saturday, Oteri and Maynard hosted a belated wedding reception for which 120 loved ones gathered at the Hyatt Regency in Sarasota, FL, Us Weekly reported.
At the party, the couple revealed the sex of the baby they're expecting next year.
"No one knew until last night," Oteri told Us. "We wanted everyone to be involved in the gender reveal, kind of like New Years and the Fourth of July combined."
Oteri and Maynard reportedly set off poppers filled with blue confetti after a countdown, making the crowd cheer with excitement. Oteri said Ben was "only interested in a little brother," so he's thrilled about the news.
Oteri, a 32-year-old photographer, and Maynard wed in a courthouse ceremony in March only three short weeks after getting engaged. Oteri is reportedly four months along in her pregnancy and due January 19, 2015.
When she appeared on The Bachelor, Oteri got sent home by Galavis after he visited her hometown in Sarasota and met her family -- including her son. Her elimination was filmed in October 2013 although the episode didn't air until February.
Maynard was reportedly a childhood best friend of Oteri's and also her first kiss. The pair actually dated after Oteri had divorced her ex-husband in 2008 following four years of marriage.