Morris and Hubbell are already parents to 2-year-old son Elijah, and the 28-year-old actress says her toddler doesn't get what's going on yet.
"He doesn't really understand the concept. I think he just thinks I'm getting a big tummy," The Cleansing Hour star explained. "He's really excited to have somebody to play with because he's at that age where he's active and wants to do stuff."
In August, Morris -- who is now six months into her second pregnancy -- announced the exciting news of baby No. 2 on Instagram, sharing a photo of her baby bump with fans.
Morris' on-screen spouse from Glee, Naya Rivera, is also relatively new to motherhood. She welcomed her first child with husband Ryan Dorsey in September. Rivera shared the first photo of her son, Josey, on Instagram earlier this month. See the cute pic in the video below.