Does Teen Mom OG's Nova Want A Little Sister Or A Little Brother?

Catelynn and Tyler are gearing up for the arrival of their "rainbow baby" -- and in a special sneak peek of the upcoming Teen Mom OG season, the couple is readying Nova for her upcoming role as big sister.


"You know why we're making pink and blue cupcakes? Why are we having a party tomorrow? Mommy has a baby in her stomach Cate tells her visibly excited three-year-old daughter in the video above, adding that they'll soon find out if it's a boy or a girl.


"Yeah!" Nova enthusiastically replies, with an enormous smile.


Nevertheless does Nova want a little brother or a little bit sister? And why do her loving parents react to her answer? Watch the heartwarming clip, then be sure to watch Cate's pregnancy journey on Teen Mom OG, premiering on Monday, October 1 at 9/8c -- and live with MTV News for Baltierra baby updates!