"Ridin' shotgun on our family fieldtrip!" the flannel-clad 23-year-old added along with the faceless pic above, which showcases her burgeoning bump and precious pup Bonnie. The cute canine, who is resting comfortably on Maci's bun in the oven, appears ready to play with her human sis. Just a few more months to go for both Benny and Bon!
In addition, Maci -- who is currently in her second trimester -- has been taking to Twitter to give some humorous updates about her pregnancy cravings and how she's been feeling avec bebe:
+ Stay with MTV News for updates on Maci's bundle of joy -- as well as updates regarding her "TM" return!