Maci Bookout recently welcomed a mini-me of her very own -- daughter Jayde Carter -- with beau Taylor McKinney, but before Bentley's little sister joined the family fold, the "Teen Mom OG" cast member had brought another addition into her expanding brood: darling dog Bonnie. While viewers became acquainted with B during this season of the MTV series -- and the 23-year-old has shared some aww-worthy snaps of the pooch on her social media accounts -- when did the sweet canine become a part of the Tennessee clan?

"For Christmas, Santa brought Bentley a boxer," the 23-year-old told MTV News in the clip below. "She's been a really good puppy."

But adorable appearance aside (tough to resist those big eyes and priceless stretch walking moves), how exactly is B behaving at this ripe young age?

"She really picked up potty training fairly quickly, thank goodness," M dishes with a smile. "She can still be a little butt-head sometimes, but she's great."

To hear more about what Bon means to M and her loved ones, watch the video. And be sure to catch part 2 of the "TMOG" reunion tonight at 10/9c!